SQL Server tutorial for beginners - Difference between union intersect and except in sql server

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. Healthy diet is very important both for the body and mind. If you like Aarvi Kitchen recipes, please support by sharing, subscribing and liking our YouTube channel. Hope you can help. https://www.youtube.com/channel/UC7sEwIXM_YfAMyonQCrGfWA/?sub_confirmation=1 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