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)

Nov 18, 2025 · The following example uses ISNULL to replace a NULL value for Color, with the string None.

The ISNULL () Function (SQL Server) The SQL Server ISNULL() function replaces NULL with a specified value. Syntax ISNULL (expr, alt)

Jul 23, 2025 · The ISNULL() function in SQL Server is a powerful tool for handling NULL values in our database queries. It allows us to replace NULL values with a specified replacement value, ensuring …

In this tutorial, you will learn how to use the SQL Server ISNULL () function to replace NULL with a specified value.

Mar 18, 2021 · Learn about the SQL Server ISNULL function and the many ways it can be used with TSQL statements.

In SQL Server, the ISNULL function is used to replace NULL values with a specified replacement value. It is a convenient way to handle NULLs in SQL queries and expressions.

The ISNULL () function returns the input expression value if it is not a NULL. In the following example, the given expression 'SQL Server' is not a null value and hence ISNULL returns the expression as it …

Jan 22, 2024 · The ISNULL Function in SQL Server replaces the NULL value in your table column with the specified value. The database table contains some missing or unknown values, represented by …

Jan 11, 2026 · Learn ISNULL () function in SQL Server with simple syntax and real examples. Understand NULL handling, calculations, WHERE usage, best practices, and interview MCQs.