SQL Server ISNULL() Function
Example
Return the specified value IF the expression is NULL, otherwise return the expression:
SELECT ISNULL(NULL, 'W3Schools.com');
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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
ISNULL(expression, value)
Parameter Values
Parameter | Description |
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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 |
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More Examples
Example
Return the specified value IF the expression is NULL, otherwise return the expression:
SELECT ISNULL('Hello', 'W3Schools.com');
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Example
Return the specified value IF the expression is NULL, otherwise return the expression:
SELECT ISNULL(NULL, 500);
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