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

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, …

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

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

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 …

Dec 1, 2022 · The ISNULL function only accepts one value which should be checked and replaced if NULL. This means it must be use nested in case more arguments should be used.

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.

Apr 7, 2025 · When we query the Comic table, we don’t want to see NULL values. Maybe we don’t want to see it in the application. Maybe NULL values will break something in an …

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 …