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 · If a literal NULL is provided as check_expression, ISNULL returns the data type of the replacement_value. If a literal NULL is provided as check_expression and no replacement_value is …

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 …

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

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 an …

Jan 21, 2025 · Suppose you want to ensure that a substitute value is used instead of NULL. For this purpose, SQL provides the ISNULL() function. This function first checks whether an expression is …

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 …

It is a convenient way to handle NULLs in SQL queries and expressions. The ISNULL function takes two parameters—the expression to be checked for NULL and the value to be returned if the expression is …

SQL Server The SQL Server ISNULL() function lets you return an alternative value when an expression is NULL:

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