UNION: What is the UNION Operator in SQL and How to Use It

The UNION operator is used in SQL to combine the results of two or more SELECT statements into a single result set. The UNION operator can be used to combine data from two or more tables, or it can be used to combine the results of two or more SELECT statements that are run against the same table. 

In this article, we will discuss how to use the UNION operator in SQL and provide some examples.

How to Use the UNION Operator:

The syntax for using the UNION operator in SQL is as follows:

SELECT column1, column2, column3 FROM table1 ...