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 …

Sep 3, 2024 · 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 …

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.

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 …

May 10, 2019 · The SQL Server ISNULL function returns the replacement value if the first parameter expression evaluates to NULL. SQL Server converts the data type of replacement …

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.

Jul 11, 2025 · In SQL Server, ISNULL and NULLIF are two essential functions used to handle NULL values, but they serve very different purposes. ISNULL is used to replace NULL with a …

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