skip to main content
Supported SQL functionality : Subqueries : EXISTS predicate
  

Try DataDirect Drivers Now

EXISTS predicate

Purpose

The Exists predicate is true only if the cardinality of the subquery is greater than 0; otherwise, it is false.

Syntax

EXISTS (subquery)

Example

SELECT empno, ename, deptno FROM emp e WHERE EXISTS
(SELECT deptno FROM dept WHERE e.deptno = dept.deptno)