How to use EXISTS / NOT EXISTS Logical Operator in SQL Server – SQL Server / TSQL Tutorial Part 125

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What is Exists / Not Exists Logical Operator in SQL Server

Exists returns TRUE if a subquery contains any rows. EXISTS is used when we want to test for the existence of rows specified by a subquery.

1) EXISTS will return TRUE if subquery contains any rows.

That is right, if our subquery will return any rows and we have used EXISTS, the outer query is going to return all rows.

2) Use EXISTS and Join with SubQuery

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