Difference between revisions of "ISNULL()"
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==See Also== | ==See Also== | ||
| − | [[EMPTY()]], [[ISALPHA()]], [[ISBLANK()]], [[ISDIGIT()]], [[NVL()]] | + | [[EMPTY()]], [[ISALPHA()]], [[ISBLANK()]], [[ISDIGIT()]], [[NVL()]], [[SET NULL]], [[SET NULLDISPLAY]] |
Revision as of 11:47, 9 June 2009
Class
Expressions and Type Conversion
Purpose
Function to test if an expression evaluates to NULL
Syntax
ISNULL(<expr>)
See Also
EMPTY(), ISALPHA(), ISBLANK(), ISDIGIT(), NVL(), SET NULL, SET NULLDISPLAY
Description
The ISNULL() function will return True (.T.) if the specified expression, <expr> is NULL otherwise False (.F.).
Example
select account_no, isnull(last_name) from customer;
Products
Recital Database Server, Recital Mirage Server, Recital Terminal Developer
