Difference between revisions of "NULL Predicate"
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==See Also== | ==See Also== | ||
| − | [[PREDICATES]], [[SQL INSERT|INSERT]], [[SQL SELECT|SELECT]], [[SQL UPDATE|UPDATE]] | + | [[SQL Predicates|PREDICATES]], [[SQL INSERT|INSERT]], [[SQL SELECT|SELECT]], [[SQL UPDATE|UPDATE]] |
Revision as of 15:44, 13 March 2009
Contents
NULL PREDICATE
Class
SQL Applications
Purpose
Special predicate
Syntax
<expression> IS [NOT] NULL
See Also
PREDICATES, INSERT, SELECT, UPDATE
Description
NULL is a special predicate to evaluate whether the specified <expression> is NULL. The optional NOT can be used to evaluate whether the specified <expression> is not NULL.
Example
EXEC SQL SELECT name, address, balance, cost*1.15 FROM accounts WHERE paid_date < date() AND ord_value IS NULL ORDER BY name, paid_date;
Products
Recital Database Server, Recital Mirage Server, Recital Terminal Developer
