A reader recently asked me to help them solve a problem combining
Use Set Operators to combine rows from several tables into a single results.
Throughout this blog we have written articles to show you how to combine rows from tables using operators. These are UNION, INTERSECTION, and EXCLUDE.
If you are not familiar with how to use set operators, I would start with the article Learn to use Union, Intersect, and Except Clauses.
One of our most popular article looks at the difference between a Join and UNION. This is something people often confuse, so it is worth a read!
All the examples for this lesson are based on Microsoft SQL Server Management Studio. They use the sample databases AdventureWorks and WideWorldImporters. You can get started using these free tools using my guide Getting Started Using SQL Server
Many times in a relational database the information you want to show in your query is in more than one table. This
Use joins and UNIONS to combine data from two or more tables. Read this article to find out each command’s strengths and
The SQL UNION, SQL INTERSECT, and SQL EXCEPT clauses are used to combine or exclude like rows from two or more tables.
In this puzzle, we’re going to learn how to write a SQL UNION without using Set Operations. Set operations allow us to
In this puzzle, we’re going learn to about SQL set operators. Set operators allow us to compare rows from two or more
