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SQL UNION

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In previous article we have learned about SQL JOINS. In this section of Software Testing Class we are concentrating on “SQL UNION”. In this post we are covering what is SQL UNION, examples of UNION, why use SQL UNION & difference between SQL JOIN and UNION.

 

What is a SQL UNION?

The SQL UNION operator allows you to combine the result of two or more SQL SELECT queries.

The only requirement to work

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