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

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

Nov 15, 2024 · This article looks at how to use SQL IS NULL and SQL IS NOT NULL operations in SQL Server along with use cases and working with NULL values.

Nov 17, 2025 · The SQL IS NULL operator checks whether a column contains a NULL (missing or unknown) value. Since NULL is not the same as zero or an empty string, IS NULL is used in the …

Mar 6, 2012 · SQL provides the special syntax for testing if a column is null, via is null and is not null, which is a special condition to test for a null (or not a null). Here's some SQL showing a variety of …

This tutorial introduces you to NULL and how to use the SQL IS NULL and IS NOT NULL to test whether an expression is NULL.

This SQL tutorial explains how to use the SQL IS NULL condition with syntax and examples. The IS NULL condition is used in SQL to test for a NULL value. It returns TRUE if a NULL value is found, …

IS NULL and NOT NULL in SQL are used to check if any field contains null values. In this tutorial, you will learn about the SQL IS NULL and NOT NULL with the help of examples.

Dec 11, 2025 · While SQL doesn’t have a direct is.null function like some languages, it employs similar logic through the IS NULL operator. Using IS NULL in SQL is straightforward, but it’s a powerful tool …

In relational databases, NULL represents the absence of data, not zero or an empty string. Use SQL IS NULL in your WHERE clause to find rows where a specific column has a NULL value. Become a …