skip to main content
Reference : SQL Statements and Extensions for the Salesforce Driver : Subqueries : UNIQUE Predicate
 

Try DataDirect Drivers Now
UNIQUE Predicate

Purpose

The Unique predicate is used to determine whether duplicate rows exist in a virtual table (one returned from a subquery).

Syntax

UNIQUE (subquery)

Example

SELECT * FROM dept d WHERE UNIQUE
(SELECT deptno FROM emp e WHERE e.deptno = d.deptno)