Conditions, 7 of 13

Null Conditions

A NULL condition tests for nulls.

null_condition::=

Table 5-9 lists the null conditions.

Type of Condition	Operation	Example
IS [NOT] NULL	Tests for nulls. This is the only condition that you should use to test for nulls. See Also: "Nulls"	SELECT last_name FROM employees WHERE commission_pct IS NULL;