Example
Check whether the expression is a Null value:
sql
SELECT IsNull(null);
Definition and Usage
The IsNull() function checks whether an expression contains Null (no data).
This function returns a Boolean value. TRUE (-1) indicates that the expression is a Null value, and FALSE (0) indicates that the expression is not a Null value.
Syntax
text
IsNull(expression)
Parameter Values
| Parameter | Description |
|---|---|
| expression | Required. The value to test |
Technical Details
| Works in: | From Access 2000 |
|---|
More Examples
Example
Return TRUE if the expression is a null value, otherwise FALSE:
sql
SELECT IsNull("Hello");
Example
Return TRUE if the expression is a null value, otherwise FALSE:
sql
SELECT IsNull(0);