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Oracle® Database SQL Language Reference
11g Release 2 (11.2)

Part Number E10592-02
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Null Conditions

A NULL condition tests for nulls. This is the only condition that you should use to test for nulls.

null_condition::=

Description of null_condition.gif follows
Description of the illustration null_condition.gif

Table 7-9 lists the null conditions.

Table 7-9 Null Condition

Type of Condition Operation Example
IS [NOT] NULL 

Tests for nulls.

See Also: "Nulls"

SELECT last_name
  FROM employees
  WHERE commission_pct
  IS NULL
  ORDER BY last_name;