Purpose

The In predicate specifies a set of values against which to compare a result set. If the values are being compared against a subquery, only a single column result set is returned.

Syntax

value [NOT] IN (value1, value2,...)
OR
value [NOT] IN (subquery)

Example

SELECT * FROM EMP WHERE DEPTNO IN
(SELECT DEPTNO FROM DEPT WHERE DNAME <> 'Sales')