Example
Return the specified value IF the expression is NULL, otherwise return the expression:
sql
SELECT ISNULL(NULL, 'example.com');
Definition and Usage
The ISNULL() function returns a specified value if the expression is NULL.
If the expression is NOT NULL, this function returns the expression.
Syntax
text
ISNULL(expression, value)
Parameter Values
| Parameter | Description |
|---|---|
| expression | Required. The expression to test whether is NULL |
| value | Required. The value to return if expression is NULL |
Technical Details
| Works in: | SQL Server (starting with 2008), Azure SQL Database, Azure SQL Data Warehouse, Parallel Data Warehouse |
|---|
More Examples
Example
Return the specified value IF the expression is NULL, otherwise return the expression:
sql
SELECT ISNULL('Hello', 'example.com');
Example
Return the specified value IF the expression is NULL, otherwise return the expression:
sql
SELECT ISNULL(NULL, 500);