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 …

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

This SQL Server tutorial explains how to use the ISNULL function in SQL Server (Transact-SQL) with syntax and examples. In SQL Server (Transact-SQL), the ISNULL function lets you return …

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 …

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

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, …

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.

Mar 24, 2024 · The ISNULL function in SQL Server is meant to be an error-handling tool of sorts. It's meant to return a non-NULL value in places where NULL may occur.

Jan 21, 2025 · SQL ISNULL () is a good choice for checking whether an expression is NULL and to provide a replacement value.

The SQL Server ISNULL function validates whether the expression is NULL or not. If it is NULL, then isnull replace them with other expression.