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SQL Tutorial in Oracle - 4 NULL, LIKE, DISTINCT, ORDER BY
 
18:37
SQL SELECT statement is used to fetch the data from a database table which returns data in the form of result table. These result tables are called result-sets. The LIKE operator is used in a WHERE clause to search for a specified pattern in a column. In SQL, wildcard characters are used with the SQL LIKE operator. SQL wildcards are used to search for data within a table. With SQL, the wildcards are: Wildcard Description % A substitute for zero or more characters _ A substitute for a single character [charlist] Sets and ranges of characters to match [^charlist] or [!charlist] Matches only a character NOT specified within the brackets Check out our website: http://www.telusko.com Follow Telusko on Twitter: https://twitter.com/navinreddy20 Follow on Facebook: Telusko : https://www.facebook.com/teluskolearnings Navin Reddy : https://www.facebook.com/navintelusko Follow Navin Reddy on Instagram: https://www.instagram.com/navinreddy20 Subscribe to our other channel: Navin Reddy : https://www.youtube.com/channel/UCxmkk8bMSOF-UBF43z-pdGQ?sub_confirmation=1 Telusko Hindi : https://www.youtube.com/channel/UCitzw4ROeTVGRRLnCPws-cw?sub_confirmation=1
Views: 18758 Telusko
SQL Distinct and Multiple Columns
 
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Jamie King of Neumont University showing how SQL DISTINCT varies when multiple columns are present in the result set.
Views: 20092 Jamie King
Part 27   Union, Intersect and Except operators in LINQ
 
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The following operators belong to Set operators category Distinct Union Intersect Except We discussed Distinct operator in Part 26. In this video we will discuss Union, Intersect and Except operators. Union combines two collections into one collection while removing the duplicate elements. Example 1: numbers1 and numbers2 collections are combined into a single collection. Notice that, the duplicate elements are removed. int[] numbers1 = { 1, 2, 3, 4, 5 }; int[] numbers2 = { 1, 3, 6, 7, 8 }; var result = numbers1.Union(numbers2); foreach (var v in result) { Console.WriteLine(v); } When comparing elements, just like Distinct() method, Union(), Intersect() and Except() methods work in a slightly different manner with complex types like Employee, Customer etc. Example 2 : Notice that in the output the duplicate employee objects are not removed. This is because, the default comparer is being used which will just check for object references being equal and not the individual property values. List[Employee] list1 = new List[Employee]() { new Employee { ID = 101, Name = "Mike"}, new Employee { ID = 102, Name = "Susy"}, new Employee { ID = 103, Name = "Mary"} }; List[Employee] list2 = new List[Employee]() { new Employee { ID = 101, Name = "Mike"}, new Employee { ID = 104, Name = "John"} }; var result = list1.Union(list2); foreach (var v in result) { Console.WriteLine(v.ID + "\t" + v.Name); } Example 3 : To solve the problem in Example 2, there are 3 ways 1. Use the other overloaded version of Union() method to which we can pass a custom class that implements IEqualityComparer 2. Override Equals() and GetHashCode() methods in Employee class 3. Project the properties into a new anonymous type, which overrides Equals() and GetHashCode() methods Project the properties into a new anonymous type, which overrides Equals() and GetHashCode() methods List[Employee] list1 = new List[Employee]() { new Employee { ID = 101, Name = "Mike"}, new Employee { ID = 102, Name = "Susy"}, new Employee { ID = 103, Name = "Mary"} }; List[Employee] list2 = new List[Employee]() { new Employee { ID = 101, Name = "Mike"}, new Employee { ID = 104, Name = "John"} }; var result = list1.Select(x =] new { x.ID, x.Name }).Union(list2.Select(x =] new { x.ID, x.Name })); foreach (var v in result) { Console.WriteLine(v.ID + "\t" + v.Name); } Intersect() returns the common elements between the 2 collections. Example 4 : Return common elements in numbers1 and numbers2 collections. int[] numbers1 = { 1, 2, 3, 4, 5 }; int[] numbers2 = { 1, 3, 6, 7, 8 }; var result = numbers1.Intersect(numbers2); foreach (var v in result) { Console.WriteLine(v); } Except() returns the elements that are present in the first collection but not in the second collection. Example 5: Return the elements that are present in the first collection but not in the second collection. int[] numbers1 = { 1, 2, 3, 4, 5 }; int[] numbers2 = { 1, 3, 6, 7, 8 }; var result = numbers1.Except(numbers2); foreach (var v in result) { Console.WriteLine(v); }
Views: 24634 kudvenkat
SQL: Union Vs UnionAll
 
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In this tutorial, you'll learn what is union & unionall PL/SQL (Procedural Language/Structured Query Language) is Oracle Corporation's procedural extension for SQL and the Oracle relational database. PL/SQL is available in Oracle Database (since version 7), TimesTen in-memory database (since version 11.2.1), and IBM DB2 (since version 9.7).[1] Oracle Corporation usually extends PL/SQL functionality with each successive release of the Oracle Database. PL/SQL includes procedural language elements such as conditions and loops. It allows declaration of constants and variables, procedures and functions, types and variables of those types, and triggers. It can handle exceptions (runtime errors). Arrays are supported involving the use of PL/SQL collections. Implementations from version 8 of Oracle Database onwards have included features associated with object-orientation. One can create PL/SQL units such as procedures, functions, packages, types, and triggers, which are stored in the database for reuse by applications that use any of the Oracle Database programmatic interfaces. PL/SQL works analogously to the embedded procedural languages associated with other relational databases. For example, Sybase ASE and Microsoft SQL Server have Transact-SQL, PostgreSQL has PL/pgSQL (which emulates PL/SQL to an extent), and IBM DB2 includes SQL Procedural Language,[2] which conforms to the ISO SQL’s SQL/PSM standard. The designers of PL/SQL modeled its syntax on that of Ada. Both Ada and PL/SQL have Pascal as a common ancestor, and so PL/SQL also resembles Pascal in several aspects. However, the structure of a PL/SQL package does not resemble the basic Object Pascal program structure as implemented by a Borland Delphi or Free Pascal unit. Programmers can define public and private global data-types, constants and static variables in a PL/SQL package.[3] PL/SQL also allows for the definition of classes and instantiating these as objects in PL/SQL code. This resembles usage in object-oriented programming languages like Object Pascal, C++ and Java. PL/SQL refers to a class as an "Abstract Data Type" (ADT) or "User Defined Type" (UDT), and defines it as an Oracle SQL data-type as opposed to a PL/SQL user-defined type, allowing its use in both the Oracle SQL Engine and the Oracle PL/SQL engine. The constructor and methods of an Abstract Data Type are written in PL/SQL. The resulting Abstract Data Type can operate as an object class in PL/SQL. Such objects can also persist as column values in Oracle database tables. PL/SQL is fundamentally distinct from Transact-SQL, despite superficial similarities. Porting code from one to the other usually involves non-trivial work, not only due to the differences in the feature sets of the two languages,[4] but also due to the very significant differences in the way Oracle and SQL Server deal with concurrency and locking. There are software tools available that claim to facilitate porting including Oracle Translation Scratch Editor,[5] CEITON MSSQL/Oracle Compiler [6] and SwisSQL.[7] The StepSqlite product is a PL/SQL compiler for the popular small database SQLite. PL/SQL Program Unit A PL/SQL program unit is one of the following: PL/SQL anonymous block, procedure, function, package specification, package body, trigger, type specification, type body, library. Program units are the PL/SQL source code that is compiled, developed and ultimately executed on the database. The basic unit of a PL/SQL source program is the block, which groups together related declarations and statements. A PL/SQL block is defined by the keywords DECLARE, BEGIN, EXCEPTION, and END. These keywords divide the block into a declarative part, an executable part, and an exception-handling part. The declaration section is optional and may be used to define and initialize constants and variables. If a variable is not initialized then it defaults to NULL value. The optional exception-handling part is used to handle run time errors. Only the executable part is required. A block can have a label. Package Packages are groups of conceptually linked functions, procedures, variables, PL/SQL table and record TYPE statements, constants, cursors etc. The use of packages promotes re-use of code. Packages are composed of the package specification and an optional package body. The specification is the interface to the application; it declares the types, variables, constants, exceptions, cursors, and subprograms available. The body fully defines cursors and subprograms, and so implements the specification. Two advantages of packages are: Modular approach, encapsulation/hiding of business logic, security, performance improvement, re-usability. They support object-oriented programming features like function overloading and encapsulation. Using package variables one can declare session level (scoped) variables, since variables declared in the package specification have a session scope.
Views: 2121 radhikaravikumar
SQL DISTINCT Within a SELECT - Retrieving Unique Values
 
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Jamie King of Neumont University demonstrating use of DISTINCT within a SQL SELECT command.
Views: 23778 Jamie King
SQL UNION, INTERSECT, EXCEPT
 
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Jamie King of Neumont University demonstrating UNION, INTERSECT, and EXCEPT.
Views: 45100 Jamie King
Difference between union intersect and except in sql server
 
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difference between union and union all difference between intersect and union difference between intersect and except in sql server union vs union all sql server union vs intersect sql server intersect vs except In this video we will discuss the difference between union intersect and except in sql server with examples. UNION operator returns all the unique rows from both the left and the right query. UNION ALL included the duplicates as well. INTERSECT operator retrieves the common unique rows from both the left and the right query. EXCEPT operator returns unique rows from the left query that aren’t in the right query’s results. UNION operator returns all the unique rows from both the queries. Notice the duplicates are removed. Select Id, Name, Gender from TableA UNION Select Id, Name, Gender from TableB UNION ALL operator returns all the rows from both the queries, including the duplicates. Select Id, Name, Gender from TableA UNION ALL Select Id, Name, Gender from TableB INTERSECT operator retrieves the common unique rows from both the left and the right query. Notice the duplicates are removed. Select Id, Name, Gender from TableA INTERSECT Select Id, Name, Gender from TableB EXCEPT operator returns unique rows from the left query that aren’t in the right query’s results. Select Id, Name, Gender from TableA EXCEPT Select Id, Name, Gender from TableB If you wnat the rows that are present in Table B but not in Table A, reverse the queries. Select Id, Name, Gender from TableB EXCEPT Select Id, Name, Gender from TableA For all these 3 operators to work the following 2 conditions must be met The number and the order of the columns must be same in both the queries The data types must be same or at least compatible For example, if the number of columns are different, you will get the following error Msg 205, Level 16, State 1, Line 1 All queries combined using a UNION, INTERSECT or EXCEPT operator must have an equal number of expressions in their target lists. Text version of the video http://csharp-video-tutorials.blogspot.com/2015/09/difference-between-union-intersect-and.html Slides http://csharp-video-tutorials.blogspot.com/2015/09/difference-between-union-intersect-and_7.html All SQL Server Text Articles http://csharp-video-tutorials.blogspot.com/p/free-sql-server-video-tutorials-for.html All SQL Server Slides http://csharp-video-tutorials.blogspot.com/p/sql-server.html All Dot Net and SQL Server Tutorials in English https://www.youtube.com/user/kudvenkat/playlists?view=1&sort=dd All Dot Net and SQL Server Tutorials in Arabic https://www.youtube.com/c/KudvenkatArabic/playlists
Views: 38085 kudvenkat
Union and union all in sql server   Part 17
 
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In this video we will learn about the 1. Purpose of UNION and UNION ALL 2. Difference between UNION and UNION ALL 3. Difference between JOIN and UNION Text version of the video http://csharp-video-tutorials.blogspot.com/2012/08/union-and-union-all-in-sql-server-part.html Slides http://csharp-video-tutorials.blogspot.com/2013/08/part-17-union-and-union-all.html All SQL Server Text Articles http://csharp-video-tutorials.blogspot.com/p/free-sql-server-video-tutorials-for.html All SQL Server Slides http://csharp-video-tutorials.blogspot.com/p/sql-server.html All Dot Net and SQL Server Tutorials in English https://www.youtube.com/user/kudvenkat/playlists?view=1&sort=dd All Dot Net and SQL Server Tutorials in Arabic https://www.youtube.com/c/KudvenkatArabic/playlists
Views: 265950 kudvenkat
Tutorial#70 Union operator in Oracle SQL Database| Using Union Operator in Select Statement
 
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Explaining what is Union Set Operator in Oracle SQL and what are the types of set Operators in Oracle SQL database or how to use a union, union all, intersect and minus in oracle server or Working with Set Operators in SQL Server or Using a UNION operator SQL server The UNION set operator returns the combined results of the two SELECT statements and UNION statements only return UNIQUE values, Set operators are used to join the results of two or more SELECT statements, The SET operators are four types UNION, UNION ALL, INTERSECT, and MINUS -------------------------------------------------------------------------------------------- Assignment: Assignment link will be available soon: ------------------------------------------------------------------------- In this series we cover the following topics: SQL basics, create table oracle, SQL functions, SQL queries, SQL server, SQL developer installation, Oracle database installation, SQL Statement, OCA, Data Types, Types of data types, SQL Logical Operator, SQL Function,Join- Inner Join, Outer join, right outer join, left outer join, full outer join, self-join, cross join, View, SubQuery, Set Operator. follow me on: Facebook Page: https://www.facebook.com/LrnWthr-319371861902642/?ref=bookmarks Contacts Email: [email protected] Instagram: https://www.instagram.com/equalconnect/ Twitter: https://twitter.com/LrnWthR
Views: 34 EqualConnect Coach
2 of 6 SQL Advanced with Oracle - Type I subqueries, plus distinct, rollback and UPPER()
 
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This video gives some examples of Type I subqueries. There are examples using IN and NOT IN. A Type I subquery is an alternative to using DISTINCT to remove duplicate rows. Subqueries, in general, are a good way to decompose a problem into smaller, simpler SQL statements. This video also shows examples of the UPPER() function and rollback. (2 of 6) There is also an "SQL Fundamentals" series. (Search for "databasemec" for tutorials using SQL Server.)
Views: 15457 Jennifer Kreie
15 of 15 SQL Basics with Oracle - Traditional set operators: UNION, INTERSECT & MINUS
 
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This video gives examples of three set operators: UNION, INTERSECT, MINUS. The union compatible rule is also explained. Set operators are used when output comes from more than one SQL statement. (15 of 15) There is also an "Advanced SQL" series. (Search for "databasemec" for tutorials using SQL Server.)
Views: 12574 Jennifer Kreie
12 of 15 SQL Basics with Oracle - Aggregate (grouping) functions and the GROUP BY clause
 
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This video explains the GROUP BY clause and some of the aggregate functions: sum, count, average, maximum, minimum, count(distinct ...), etc. An example of using an aggregate function would be to group students by major and only show the number of students in each major, not individual student information. (12 of 15) There is also an "Advanced SQL" series. (Search for "databasemec" for tutorials using SQL Server.)
Views: 5565 Jennifer Kreie
Oracle SQL: UNION vs UNION ALL
 
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https://www.databasestar.com/union-vs-union-all/ In this video, we’ll learn what the UNION and UNION ALL keywords are, and see what the differences between them are. The UNION and UNION ALL keywords are both set operators, meaning they work with sets of data. They are used to combine two result sets into one. They are very similar, unlike the INTERSECT and MINUS keywords which reduce the data that is shown in the result set. But other than a slight difference in their name, how can we compare Oracle SQL UNION vs UNION ALL? The main difference is how duplicates are treated, which I explain in this video. I also cover the performance differences of these two keywords, and which one is recommended. For more information on UNION and UNION ALL, including the code from these examples, refer to the related article here: https://www.databasestar.com/union-vs-union-all/
Views: 185 Database Star
SQL Server 2017 Tutorial 7 - DISTINCT and UNION
 
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DISTINCT, UNION and UNION ALL in SQL Server 2017. Support YPN on Patreon! http://www.patreon.com/YPN Website and Forum: http://yourprogrammingnetwork.co.uk Join us on Facebook! https://www.facebook.com/pages/Your-Programming-Network/280950122022281 Chat on Discord https://discord.gg/br3ZB3f
Getting Unique Records with DISTINCT (Introduction to Oracle SQL)
 
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How to find unique records using the DISTINCT keyword
Views: 163 Database Star
How to Get Unique Records From Two Different Columns in SQL Table
 
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Get Source Code/Read : http://intactabode.com/ For Developing support email your Details at : [email protected] Install Free Trail GST Ready Accounting Package Send your Contact information Name, Email, Contact Number to email : [email protected] watch demo in English : https://www.youtube.com/watch?v=a4sFNtZuYzs&ab_channel=IntactAbode watch demo in Hindi : https://www.youtube.com/watch?v=I3eCieDpG3o&ab_channel=IntactAbode Website : http://relybill.com/ The SQL UNION operator is used to combine the result sets of 2 or more SELECT statements. It removes duplicate rows between the various SELECT statements. Each SELECT statement within the UNION must have the same number of fields in the result sets with similar data types. For Source Code Visit : http://corneey.com/wJ6X2K Subscribe to YouTube channel http://corneey.com/wJ6VoC Like us on Facebook http://corneey.com/wJ6C2l Follow us on Twitter http://corneey.com/wJ6C7x Follow me on Google+ http://corneey.com/wJ6Vhc linkedin http://corneey.com/wJ6V5g
Views: 1098 Intact Abode
SQL Complete Tutorial - Use DISTINCT to eliminate Duplicate rows - Chapter 13
 
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In this video, I have explained how to use DISTINCT function in the query to eliminate duplicate rows in the table.
Views: 2361 Vicky's Blog
SQL: WITH Clause
 
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In this tutorial, you'll learn will learn how to use with clause PL/SQL (Procedural Language/Structured Query Language) is Oracle Corporation's procedural extension for SQL and the Oracle relational database. PL/SQL is available in Oracle Database (since version 7), TimesTen in-memory database (since version 11.2.1), and IBM DB2 (since version 9.7).[1] Oracle Corporation usually extends PL/SQL functionality with each successive release of the Oracle Database. PL/SQL includes procedural language elements such as conditions and loops. It allows declaration of constants and variables, procedures and functions, types and variables of those types, and triggers. It can handle exceptions (runtime errors). Arrays are supported involving the use of PL/SQL collections. Implementations from version 8 of Oracle Database onwards have included features associated with object-orientation. One can create PL/SQL units such as procedures, functions, packages, types, and triggers, which are stored in the database for reuse by applications that use any of the Oracle Database programmatic interfaces. PL/SQL works analogously to the embedded procedural languages associated with other relational databases. For example, Sybase ASE and Microsoft SQL Server have Transact-SQL, PostgreSQL has PL/pgSQL (which emulates PL/SQL to an extent), and IBM DB2 includes SQL Procedural Language,[2] which conforms to the ISO SQL’s SQL/PSM standard. The designers of PL/SQL modeled its syntax on that of Ada. Both Ada and PL/SQL have Pascal as a common ancestor, and so PL/SQL also resembles Pascal in several aspects. However, the structure of a PL/SQL package does not resemble the basic Object Pascal program structure as implemented by a Borland Delphi or Free Pascal unit. Programmers can define public and private global data-types, constants and static variables in a PL/SQL package.[3] PL/SQL also allows for the definition of classes and instantiating these as objects in PL/SQL code. This resembles usage in object-oriented programming languages like Object Pascal, C++ and Java. PL/SQL refers to a class as an "Abstract Data Type" (ADT) or "User Defined Type" (UDT), and defines it as an Oracle SQL data-type as opposed to a PL/SQL user-defined type, allowing its use in both the Oracle SQL Engine and the Oracle PL/SQL engine. The constructor and methods of an Abstract Data Type are written in PL/SQL. The resulting Abstract Data Type can operate as an object class in PL/SQL. Such objects can also persist as column values in Oracle database tables. PL/SQL is fundamentally distinct from Transact-SQL, despite superficial similarities. Porting code from one to the other usually involves non-trivial work, not only due to the differences in the feature sets of the two languages,[4] but also due to the very significant differences in the way Oracle and SQL Server deal with concurrency and locking. There are software tools available that claim to facilitate porting including Oracle Translation Scratch Editor,[5] CEITON MSSQL/Oracle Compiler [6] and SwisSQL.[7] The StepSqlite product is a PL/SQL compiler for the popular small database SQLite. PL/SQL Program Unit A PL/SQL program unit is one of the following: PL/SQL anonymous block, procedure, function, package specification, package body, trigger, type specification, type body, library. Program units are the PL/SQL source code that is compiled, developed and ultimately executed on the database. The basic unit of a PL/SQL source program is the block, which groups together related declarations and statements. A PL/SQL block is defined by the keywords DECLARE, BEGIN, EXCEPTION, and END. These keywords divide the block into a declarative part, an executable part, and an exception-handling part. The declaration section is optional and may be used to define and initialize constants and variables. If a variable is not initialized then it defaults to NULL value. The optional exception-handling part is used to handle run time errors. Only the executable part is required. A block can have a label. Package Packages are groups of conceptually linked functions, procedures, variables, PL/SQL table and record TYPE statements, constants, cursors etc. The use of packages promotes re-use of code. Packages are composed of the package specification and an optional package body. The specification is the interface to the application; it declares the types, variables, constants, exceptions, cursors, and subprograms available. The body fully defines cursors and subprograms, and so implements the specification. Two advantages of packages are: Modular approach, encapsulation/hiding of business logic, security, performance improvement, re-usability. They support object-oriented programming features like function overloading and encapsulation. Using package variables one can declare session level (scoped) variables, since variables declared in the package specification have a session scope.
Views: 14601 radhikaravikumar
MySQL Database Tutorial - 24 - UNION
 
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Facebook - https://www.facebook.com/TheNewBoston-464114846956315/ GitHub - https://github.com/buckyroberts Google+ - https://plus.google.com/+BuckyRoberts LinkedIn - https://www.linkedin.com/in/buckyroberts reddit - https://www.reddit.com/r/thenewboston/ Support - https://www.patreon.com/thenewboston thenewboston - https://thenewboston.com/ Twitter - https://twitter.com/bucky_roberts
Views: 106950 thenewboston
55. SELECT DISTINCT in SQL (Hindi)
 
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Please Subscribe Channel Like, Share and Comment Visit : www.geekyshows.com
Views: 13364 Geeky Shows
Lesson 8 - SQL BETWEEN, IN and More Filtering (Oracle SQL Certification)
 
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In this lesson we continue on from the last lesson and dive deeper into query filtering using the BETWEEN, IN and NULL keywords
Views: 4668 Imtiaz Ahmad
SQL Distinct Operator
 
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In this video, you will find how to use Distinct Operator in Oracle SQL. Please subscribe if you want to be informed about our new videos. For more Information and more videos, visit our site. www.oracle-master.com Related Keywords: "oracle", "sql", "sql tutorial", "learn sql", "learn advanced sql", "advanced", "oracle tutorial", "oracle training".
SQL Server Tutorial 31: Using TOP, DISTINCT, NULL and UNION
 
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How to use TOP, DISTINCT, NULL and UNION with T-SQL.For more info, or a copy of any of the scripts used in any of my tutorials, please email me at [email protected]
Views: 361 Johnny Deluca
SQL Tutorial 12 Advanced Subqueries returning multiple columns
 
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SQL Tutorial on Advanced Subqueries returning multiple columns Check out our website: http://www.telusko.com Follow Telusko on Twitter: https://twitter.com/navinreddy20 Follow on Facebook: Telusko : https://www.facebook.com/teluskolearnings Navin Reddy : https://www.facebook.com/navintelusko Follow Navin Reddy on Instagram: https://www.instagram.com/navinreddy20 Subscribe to our other channel: Navin Reddy : https://www.youtube.com/channel/UCxmkk8bMSOF-UBF43z-pdGQ?sub_confirmation=1 Telusko Hindi : https://www.youtube.com/channel/UCitzw4ROeTVGRRLnCPws-cw?sub_confirmation=1
Views: 63914 Telusko
Select Sum, Distinct, In, Null on Oracle in telugu
 
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#KOTHA_ABHISHEK http://htmlintelugu1.blogspot.com http://cssintelugu1.blogspot.com http://javascriptintelugu1.blogspot.com http://sqlintelugu1.blogspot.com http://javaintelugu1.blogspot.com
Views: 599 KOTHA ABHISHEK
ORACLE SQL INTERVIEW QUESTION : HOW TO SELECT ODD OR EVEN ROWS FROM A TABLE IN ORACLE
 
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This video tutorial answers the frequently asked interview question, how to select only odd or even records in oracle sql, after watching this video you will understand more on the topic and will be able to answer this interview question with a lot of confidence.
Views: 4490 Kishan Mashru
SQL - SOME ANY ALL
 
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Jamie King of Neumont University discussing the use of SOME, ANY, and ALL with subqueries.
Views: 20488 Jamie King
Select statement in sql server - Part 10
 
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In this video we will learn 1. Select specific or all columns 2. Distinct rows 3. Filtering with where clause. 4. Wild Cards in SQL Server 5. Joining multiple conditions using AND and OR operators 6. Sorting rows using order by 7. Selecting top n or top n percentage of rows Text version of the video http://csharp-video-tutorials.blogspot.com/2012/08/select-statement-part-10.html Slides http://csharp-video-tutorials.blogspot.com/2013/08/part-10-all-about-select.html All SQL Server Text Articles http://csharp-video-tutorials.blogspot.com/p/free-sql-server-video-tutorials-for.html All SQL Server Slides http://csharp-video-tutorials.blogspot.com/p/sql-server.html All Dot Net and SQL Server Tutorials in English https://www.youtube.com/user/kudvenkat/playlists?view=1&sort=dd All Dot Net and SQL Server Tutorials in Arabic https://www.youtube.com/c/KudvenkatArabic/playlists
Views: 345899 kudvenkat
P#7 How to find duplicate records in oracle SQL Database - interview question by Rakesh Malviya
 
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Oracle SQL Online training on - How to finds duplicates rows/records in Oracle SQL Database, In this also you will learn How to find duplicates names in the employees table, this is most commonly asked interview question Following Question answered in this video: 1. How to identify duplicate record/rows in the table 2. How to Filter duplicates records 3. Query to find duplicates records 4. This is the most frequently asked interview question 5. how to find duplicate records using group by and having clause 6. find duplicates entries in table 7. how to find duplicate values in Oracle table 8. SQL query to find duplicates values in Oracle table 9. how to remove duplicates records Oracle SQL Complete Tutorial/Training/Course for the beginner: https://www.youtube.com/watch?v=3v4s3XMw4q0&list=PLiLpmqwkwkCt0QeXD8j7BwIoOaBGBRrZC follow me on: Facebook Page: https://www.facebook.com/LrnWthr-319371861902642/?ref=bookmarks Contacts Email: [email protected] Instagram: https://www.instagram.com/equalconnect/ Twitter: https://twitter.com/LrnWthR #equalConnectCoach #rakeshmalviya #OracleTutorial
Views: 100 EqualConnect Coach
Difference between Subquery and Join Operation | Oracle SQL Tutorial Videos | Mr.Vijay Kumar
 
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Difference between Subquery and Join operation by Mr. Vijay Kumar ** For Online Training Registration: https://goo.gl/r6kJbB ► Call: +91-8179191999 💡 Visit Our Website for Classroom Training: https://nareshit.in/oracle-training/ 💡 For Online Training: https://nareshit.com/oracle-online-training/ #Oracle #Training #CourseVideos -------------------------- 💡 About NareshIT: "Naresh IT is having 14+ years of experience in software training industry and the best Software Training Institute for online training, classroom training, weekend training, corporate training of Hadoop, Salesforce, AWS, DevOps, Spark, Data Science, Python, Tableau, RPA , Java, C#.NET, ASP.NET, Oracle, Testing Tools, Silver light, Linq, SQL Server, Selenium, Android, iPhone, C Language, C++, PHP and Digital Marketing in USA, Hyderabad, Chennai and Vijayawada, Bangalore India which provides online training across all the locations -------------------------- 💡 Our Online Training Features: 🎈 Training with Real-Time Experts 🎈 Industry Specific Scenario’s 🎈 Flexible Timings 🎈 Soft Copy of Material 🎈 Share Videos of each and every session. -------------------------- 💡 Please write back to us at 📧 [email protected]/ 📧 [email protected] or Call us at the USA: ☎+1404-232-9879 or India: ☎ +918179191999 -------------------------- 💡 Check The Below Links ► For Course Reg: https://goo.gl/r6kJbB ► Subscribe to Our Channel: https://goo.gl/q9ozyG ► Circle us on G+: https://plus.google.com/+NareshIT ► Like us on Facebook: https://www.facebook.com/NareshIT ► Follow us on Twitter: https://twitter.com/nareshitek ► Follow us on Linkedin: https://goo.gl/CRBZ5F ► Follow us on Instagram: https://goo.gl/3UXYK3
Views: 11736 Naresh i Technologies
Union, Minus & Intersect: Databases for Developers #15
 
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The set operators allow you to combine many tables into one. These come in three varieties: Union Intersect Minus Watch this video to learn how they work. And find out how you can use them to compare the contents of two tables, giving you a report of the differences. Want more? https://docs.oracle.com/en/database/oracle/oracle-database/18/sqlrf/Set-Operators.html Need help with SQL? Ask us over on AskTOM: https://asktom.oracle.com Twitter: https://twitter.com/ChrisRSaxon Daily SQL Twitter tips: https://twitter.com/SQLDaily All Things SQL blog: https://blogs.oracle.com/sql/ ============================ The Magic of SQL with Chris Saxon Copyright © 2015 Oracle and/or its affiliates. Oracle is a registered trademark of Oracle and/or its affiliates. All rights reserved. Other names may be registered trademarks of their respective owners. Oracle disclaims any warranties or representations as to the accuracy or completeness of this recording, demonstration, and/or written materials (the “Materials”). The Materials are provided “as is” without any warranty of any kind, either express or implied, including without limitation warranties or merchantability, fitness for a particular purpose, and non-infringement.
Views: 872 The Magic of SQL
Identify and Delete Duplicate records (rows) - SQL Server
 
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Identify and Delete Duplicate records/rows. Check and get the script here in my blog: http://sqlwithmanoj.com/2011/10/14/identify-delete-duplicate-records-from-a-table/ For more updates like my page in FB: https://www.facebook.com/sqlwithmanoj
Views: 23057 SQL with Manoj
P#4 Difference between union and union all in oracle database -  interview question on sql queries
 
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Tutorial on what is the difference union and union all this frequently asked question will help you in Oracle SQL database interview question This will clear few concepts of set operator and over here the difference between union and union all in oracle explained with the example , union vs union all performance slow in oracle This will cover the Following question: 1) when to use union and when to use union all definition : the difference between Union and Union all is that Union all will not eliminate duplicate rows, instead, it just pulls all rows from all tables fitting your query specifics and combines them into a table. A UNION statement effectively does a SELECT DISTINCT on the results follow me on: Facebook Page: https://www.facebook.com/LrnWthr-319371861902642/?ref=bookmarks Contacts Email: [email protected] Instagram: https://www.instagram.com/equalconnect/ Twitter: https://twitter.com/LrnWthR #OracleSQL #rakeshmalviya #UnionALL
Views: 36 EqualConnect Coach
Difference between where and having in sql server
 
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sql server where vs having sql server group by where having group by having sql server In this vide we will discuss the difference between where and having caluses in sql server. Let us understand the difference with an example. To calculate total sales by product, we would write a GROUP BY query as shown below SELECT Product, SUM(SaleAmount) AS TotalSales FROM Sales GROUP BY Product Now if we want to find only those products where the total sales amount is greater than $1000, we will use HAVING clause to filter products SELECT Product, SUM(SaleAmount) AS TotalSales FROM Sales GROUP BY Product HAVING SUM(SaleAmount) ] 1000 If we use WHERE clause instead of HAVING clause, we will get a syntax error. This is because the WHERE clause doesn’t work with aggregate functions like sum, min, max, avg, etc. SELECT Product, SUM(SaleAmount) AS TotalSales FROM Sales GROUP BY Product WHERE SUM(SaleAmount) ] 1000 So in short, the difference is WHERE clause cannot be used with aggregates where as HAVING can. However, there are other differences as well that we need to keep in mind when using WHERE and HAVING clauses. WHERE clause filters rows before aggregate calculations are performed where as HAVING clause filters rows after aggregate calculations are performed. Let us understand this with an example. Total sales of iPhone and Speakers can be calculated by using either WHERE or HAVING clause Calculate Total sales of iPhone and Speakers using WHERE clause : In this example the WHERE clause retrieves only iPhone and Speaker products and then performs the sum. SELECT Product, SUM(SaleAmount) AS TotalSales FROM Sales WHERE Product in ('iPhone', 'Speakers') GROUP BY Product Calculate Total sales of iPhone and Speakers using HAVING clause : This example retrieves all rows from Sales table, performs the sum and then removes all products except iPhone and Speakers. SELECT Product, SUM(SaleAmount) AS TotalSales FROM Sales GROUP BY Product HAVING Product in ('iPhone', 'Speakers') So from a performance standpoint, HAVING is slower than WHERE and should be avoided when possible. Another difference is WHERE comes before GROUP BY and HAVING comes after GROUP BY. Difference between WHERE and Having 1. WHERE clause cannot be used with aggregates where as HAVING can. This means WHERE clause is used for filtering individual rows where as HAVING clause is used to filter groups. 2. WHERE comes before GROUP BY. This means WHERE clause filters rows before aggregate calculations are performed. HAVING comes after GROUP BY. This means HAVING clause filters rows after aggregate calculations are performed. So from a performance standpoint, HAVING is slower than WHERE and should be avoided when possible. 3. WHERE and HAVING can be used together in a SELECT query. In this case WHERE clause is applied first to filter individual rows. The rows are then grouped and aggregate calculations are performed, and then the HAVING clause filters the groups. Text version of the video http://csharp-video-tutorials.blogspot.com/2015/09/difference-between-where-and-having-in.html Slides http://csharp-video-tutorials.blogspot.com/2015/09/difference-between-where-and-having-in_15.html All SQL Server Text Articles http://csharp-video-tutorials.blogspot.com/p/free-sql-server-video-tutorials-for.html All SQL Server Slides http://csharp-video-tutorials.blogspot.com/p/sql-server.html Full SQL Server Course https://www.youtube.com/playlist?list=PL4cyC4G0M1RQ_Rm52cQ4CcOJ_T_HXeMB4 All Dot Net and SQL Server Tutorials in English https://www.youtube.com/user/kudvenkat/playlists?view=1&sort=dd All Dot Net and SQL Server Tutorials in Arabic https://www.youtube.com/c/KudvenkatArabic/playlists
Views: 71125 kudvenkat
SQL Inner Join Multiple Tables with SUM Tutorial - SQL 2008/2012/2016/2017
 
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Use inner joins with multiple tables to create reports. Uses aliases, and the SUM aggregate function to demonstrate the flexibility of the join statement. Get the SQL script to create the database and run the exercies in the video here: https://www.qewbi.com/sql/scripts/qewbijoins.zip
Views: 142121 Edward Kench
Oracle Using In , Between and Not تعليم أوراكل
 
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by Mohamed El Desouki - محمد الدسوقى [email protected] Tel :00966 553450836 جامعة سلمان بن عبد العزيز - السعودية - الخرج How to use In , Between and Not. Text Book: Fundamentals of Database Systems, 5th Edition, by Elmasri/Navathe, published by Addison-W oracle create table statement oracle drop table statement oracle constraints database constraints primary key constraint foreign key constraint check constraint null not null constraint unique constraint insert into statement update statement delete statement select statement basic query where clause select where Like '%' Like '_' select where Like select where Between Between , Not Between select where In , Not In
SQL Joins Tutorial for Beginners - Inner Join, Left Join, Right Join, Full Outer Join
 
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Learn how to create SQL Joins. The first 10 minutes teach you the basics. Inner Join, Left Outer Join, Right Outer Join, and Full Outer Join. The second 10 minutes show you are few techniques that will help you as you start building joins. READ THE ORIGINAL ARTICLE WITH THE TABLE SCRIPS http://www.sqltrainingonline.com/sql-joins-tutorial-for-beginners/ YOUTUBE NEWS UPDATES http://www.youtube.com/user/sqltrainingonline VISIT SQLTRAININGONLINE.COM FOR TONS MORE VIDEO NEWS & TIPS http://www.sqltrainingonline.com SUBSCRIBE FOR OTHER SQL TIPS AND NEWS! http://www.youtube.com/subscription_center?add_user=sqltrainingonline SUBSCRIBE TO OUR EMAIL LIST! http://www.sqltrainingonline.com LET'S CONNECT! Facebook: http://facebook.com/SQLTrainingOnline Twitter: http://twitter.com/sql_by_joey Linkedin: http://linkedin.com/in/joeyblue SQLTrainingOnline: http://www.sqltrainingonline.com
Views: 170082 Joey Blue
SQL Database Fundamentals for Data Science - By Microsoft
 
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SQL is an essential skill to have in every data scientist. You should have sql skill and better understanding. In this complete SQL course you will learn about the following. SQL Query Types SELECT Statement Retrieve records from a table SELECT LIMIT Statement Retrieve records from a table and limit results SELECT TOP Statement Retrieve records from a table and limit results INSERT Statement Insert records into a table UPDATE Statement Update records in a table DELETE Statement Delete records from a table TRUNCATE TABLE Statement Delete all records from a table (no rollback) UNION Operator Combine 2 result sets (removes duplicates) UNION ALL Operator Combine 2 result sets (includes duplicates) INTERSECT Operator Intersection of 2 result sets MINUS Operator Result set of one minus the result set of another EXCEPT Operator Result set of one minus the result set of another SQL Comparison Operators Comparison Operators Operators such as greater than, less than and so on SQL Joins JOIN Tables Inner and Outer joins SQL Aliases ALIASES Create a temporary name for a column or table SQL Clauses DISTINCT Clause Retrieve unique records FROM Clause List tables and join information WHERE Clause Filter results ORDER BY Clause Sort query results GROUP BY Clause Group by one or more columns HAVING Clause Restrict the groups of returned rows SQL Functions COUNT Function Return the count of an expression SUM Function Return the sum of an expression MIN Function Return the min of an expression MAX Function Return the max of an expression AVG Function Return the average of an expression SQL Conditions AND Condition 2 or more conditions to be met OR Condition Any one of the conditions are met AND & OR Combining AND and OR conditions LIKE Condition Use wildcards in a WHERE clause IN Condition Alternative to multiple OR conditions NOT Condition Negate a condition IS NULL Condition Test for NULL value IS NOT NULL Condition Test for NOT NULL value BETWEEN Condition Retrieve within a range (inclusive) EXISTS Condition Condition is met if subquery returns at least one row SQL Tables and Views CREATE TABLE Create a table CREATE TABLE AS Create a table from another table's definition and data ALTER TABLE Add, modify or delete columns in a table; rename a table DROP TABLE Delete a table GLOBAL TEMP Tables Tables that are distinct within SQL session LOCAL TEMP Tables Tables that are distinct within modules and embedded SQL program SQL VIEW Virtual tables (views of other tables) SQL Keys, Constraints and Indexes Primary Keys Create or drop primary keys Indexes Create and drop indexes (performance tuning) SQL Data Types Data Types Data Types in SQL SQL Programming Comments How to create comments within your SQL statement and so on. You will get complete overview of SQL database and learn skill you required for data science. **************************************************************** Connect With Me: Learn about Python, data science, Machine Learning: https://www.sheikhhanif.github.io/ Join data science group: Facebook Group: https://www.facebook.com/groups/1783416061775380/ Github: https://github.com/SheikhHanif *****************************************************************
Views: 3910 Geek's Lesson
Complex Joins in Tableau
 
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In this tutorial video, we will be going over complex joins in Tableau. We'll talk about: - How to join more than two tables together, - What data is included and excluded for various types of joins, - How your joins affect calculations in your views, and more. We'll also be talking briefly about how Level of Detail expressions can be used with joined data that has duplicate records. Boulder Insight - http://boulderinsight.com/ Blog - http://boulderinsight.com/index.php/boulder-insight-blog/
Views: 63301 Boulder Insight
SQL 05 - SELECT DISTINCT columns FROM
 
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This video is about SQL 05 - SELECT DISTINCT columns FROM
Using DISTINCT in SQL
 
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A brief beginner's introduction to the DISTINCT operator in SQL. DISTINCT creates a set of unique records, based on field values. In other words, duplicates records, based on field values, are removed. DISTINCT is often used with COUNT, to achieve a count of distinct values. Be aware that NULL is treated as a distinct value in terms of records, but COUNT ignores NULLs. See the full code here: https://douglaskline.blogspot.com/2018/10/using-distinct-in-sql.html
Views: 114 Database by Doug
12a of 15 SQL Basics with Oracle - Variations for the COUNT() function
 
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This video looks at three variations of the COUNT() function: COUNT(*), COUNT(field_name) and COUNT(DISTINCT field_name). The examples in the video show what the differences are in the result set for each COUNT variation. (12a of 15)
Views: 1506 Jennifer Kreie
MySQL Tutorial #6 in Hindi: Between and NOT Between Operator with Solved Queries
 
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MySQL Tutorial #6 in Hindi: Between and NOT Between Operator with Solved Queries MySQL tutorial for Beginners MySQL Installation Guide How to Install MySQL on windows 10
What to choose for performance   SubQuery or Joins   Part 62
 
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Text version of the video http://csharp-video-tutorials.blogspot.com/2013/01/what-to-choose-for-performance.html Slides http://csharp-video-tutorials.blogspot.com/2013/09/part-62-what-to-choose-for-performance.html All SQL Server Text Articles http://csharp-video-tutorials.blogspot.com/p/free-sql-server-video-tutorials-for.html All SQL Server Slides http://csharp-video-tutorials.blogspot.com/p/sql-server.html All Dot Net and SQL Server Tutorials in English https://www.youtube.com/user/kudvenkat/playlists?view=1&sort=dd All Dot Net and SQL Server Tutorials in Arabic https://www.youtube.com/c/KudvenkatArabic/playlists What to choose for performance - SubQuery or Joins According to MSDN, in sql server, in most cases, there is usually no performance difference between queries that uses sub-queries and equivalent queries using joins. For example, on my machine I have 400,000 records in tblProducts table 600,000 records in tblProductSales tables The following query, returns, the list of products that we have sold atleast once. This query is formed using sub-queries. When I execute this query I get 306,199 rows in 6 seconds Select Id, Name, Description from tblProducts where ID IN ( Select ProductId from tblProductSales ) At this stage please clean the query and execution plan cache using the following T-SQL command. CHECKPOINT; GO DBCC DROPCLEANBUFFERS; Go DBCC FREEPROCCACHE; GO Now, run the query that is formed using joins. Notice that I get the exact same 306,199 rows in 6 seconds. Select distinct tblProducts.Id, Name, Description from tblProducts inner join tblProductSales on tblProducts.Id = tblProductSales.ProductId Please Note: I have used automated sql script to insert huge amounts of this random data. Please watch Part 61 of SQL Server tutorial, in which we have discussed about this automated script. According to MSDN, in some cases where existence must be checked, a join produces better performance. Otherwise, the nested query must be processed for each result of the outer query. In such cases, a join approach would yield better results. The following query returns the products that we have not sold atleast once. This query is formed using sub-queries. When I execute this query I get 93,801 rows in 3 seconds Select Id, Name, [Description] from tblProducts where Not Exists(Select * from tblProductSales where ProductId = tblProducts.Id) When I execute the below equivalent query, that uses joins, I get the exact same 93,801 rows in 3 seconds. Select tblProducts.Id, Name, [Description] from tblProducts left join tblProductSales on tblProducts.Id = tblProductSales.ProductId where tblProductSales.ProductId IS NULL In general joins work faster than sub-queries, but in reality it all depends on the execution plan that is generated by SQL Server. It does not matter how we have written the query, SQL Server will always transform it on an execution plan. If sql server generates the same plan from both queries, we will get the same result. I would say, rather than going by theory, turn on client statistics and execution plan to see the performance of each option, and then make a decision. In a later video session we will discuss about client statistics and execution plans in detail.
Views: 89753 kudvenkat
SQL Union and Union All - SQL Training Online
 
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Union and Union All are very similar, but if you don’t understand the differences, it can cause trouble. In this video I do a quick demonstration of the Union and Union All Function. READ THE ORIGINAL ARTICLE WITH SQL SCRIPTS HERE http://www.sqltrainingonline.com/sql-server-union-all/ YOUTUBE NEWS UPDATES http://www.youtube.com/user/sqltrainingonline VISIT SQLTRAININGONLINE.COM FOR TONS MORE VIDEO NEWS & TIPS http://www.sqltrainingonline.com SUBSCRIBE FOR OTHER SQL TIPS AND NEWS! http://www.youtube.com/subscription_center?add_user=sqltrainingonline SUBSCRIBE TO OUR EMAIL LIST! http://www.sqltrainingonline.com LET'S CONNECT! Google+: http://gplus.to/SQLTrainingOnline Facebook: http://facebook.com/SQLTrainingOnline Twitter: http://twitter.com/sql_by_joey Linkedin: http://linkedin.com/in/joeyblue SQLTrainingOnline: http://www.sqltrainingonline.com
Views: 3215 Joey Blue
INTERSECT, EXCEPT Operators in SQL Server Tamil
 
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Click here to Subscribe to IT PORT Channel : https://www.youtube.com/channel/UCMjmoppveJ3mwspLKXYbVlg INTERSECT operator returns all distinct rows from Left hand side table which does exist in Right hand side table EXCEPT operator returns all distinct rows from left hand side table which does not exist in right hand side table The Basic Rules for using these Operators are a) The Number and the Order of the columns must be the same in all queries b) The data type must be compatible Explained in Tamil
Views: 313 IT Port
59. Subquery in PL/SQL Oracle
 
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In this video you will learn about Subquery in Oracle. For Support =========== Email: [email protected] Contact Form: http://www.learninhindi.com/home/contact Our Social Media ================ Facebook: https://www.facebook.com/LearnInHindi Twitter: https://twitter.com/LearnInHindi For Training & Videos ===================== For more videos and articles visit: http://www.learninhindi.com Free Java Programming In Hindi Course ===================================== https://www.youtube.com/playlist?list=PLOZ3jentlCDAwwhMyoLISrxkXTADGp7PH Free Oracle PL/SQL Programming In Hindi Course ============================================== https://www.youtube.com/playlist?list=PLB5DA82419C2D99B6 Free C Programming In Hindi Course ================================== https://www.youtube.com/playlist?list=PLOZ3jentlCDAxKpBLMWogxSdy6BZcsAJq Trips & Tricks Channel ====================== https://www.youtube.com/channel/UCGmLfkuCo-3lHHJXRJ9HUMw Programming in Hindi Channel ============================ https://www.youtube.com/channel/UCudElIDgwNrybeAvXIy1HZQ
Views: 6463 ITORIAN
Intersect operator in sql server
 
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sql intersect vs join sql server intersect example sql server intersect vs inner join sql server inner join remove duplicates In this video we will discuss 1. Intersect operator in sql server 2. Difference between intersect and inner join Intersect operator retrieves the common records from both the left and the right query of the Intersect operator. Introduced in SQL Server 2005 The number and the order of the columns must be same in both the queries The data types must be same or at least compatible Let us understand INTERSECT operator with an example. The following query retrieves the common records from both the left and the right query of the Intersect operator. Select Id, Name, Gender from TableA Intersect Select Id, Name, Gender from TableB We can also achieve the same thinkg using INNER join. The following INNER join query would produce the exact same result. Select TableA.Id, TableA.Name, TableA.Gender From TableA Inner Join TableB On TableA.Id = TableB.Id What is the difference between INTERSECT and INNER JOIN 1. INTERSECT filters duplicates and returns only DISTINCT rows that are common between the LEFT and Right Query, where as INNER JOIN does not filter the duplicates. To understand this difference, insert the following row into TableA Insert into TableA values (2, 'Mary', 'Female') Now execute the following INTERSECT query. Notice that we get only the DISTINCT rows Select Id, Name, Gender from TableA Intersect Select Id, Name, Gender from TableB Now execute the following INNER JOIN query. Notice that the duplicate rows are not filtered. Select TableA.Id, TableA.Name, TableA.Gender From TableA Inner Join TableB On TableA.Id = TableB.Id You can make the INNER JOIN behave like INTERSECT operator by using the DISTINCT operator Select DISTINCT TableA.Id, TableA.Name, TableA.Gender From TableA Inner Join TableB On TableA.Id = TableB.Id 2. INNER JOIN treats two NULLS as two different values. So if you are joining two tables based on a nullable column and if both tables have NULLs in that joining column then, INNER JOIN will not include those rows in the result-set, where as INTERSECT treats two NULLs as a same value and it returns all matching rows. To understand this difference, execute the following 2 insert statements Insert into TableA values(NULL, 'Pam', 'Female') Insert into TableB values(NULL, 'Pam', 'Female') INTERSECT query Select Id, Name, Gender from TableA Intersect Select Id, Name, Gender from TableB INNER JOIN query Select TableA.Id, TableA.Name, TableA.Gender From TableA Inner Join TableB On TableA.Id = TableB.Id Text version of the video http://csharp-video-tutorials.blogspot.com/2015/09/intersect-operator-in-sql-server.html Slides http://csharp-video-tutorials.blogspot.com/2015/09/intersect-operator-in-sql-server_6.html All SQL Server Text Articles http://csharp-video-tutorials.blogspot.com/p/free-sql-server-video-tutorials-for.html All SQL Server Slides http://csharp-video-tutorials.blogspot.com/p/sql-server.html All Dot Net and SQL Server Tutorials in English https://www.youtube.com/user/kudvenkat/playlists?view=1&sort=dd All Dot Net and SQL Server Tutorials in Arabic https://www.youtube.com/c/KudvenkatArabic/playlists
Views: 39271 kudvenkat