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

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 18, 2025 · C. Test for NULL in a WHERE clause Don't use ISNULL to find NULL values. Use IS NULL instead. The following example finds all products that have NULL in the weight …

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 …

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 …

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 …

This SQL tutorial covers how to work with null values by using SQL's IS NULL operator to select rows where a column contains no data.

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.

Aug 13, 2025 · In SQL, NULL represents the absence of a value (“unknown” or “does not exist”) and cannot be compared using regular comparison operators like =. In fact, the result of NULL …

Dec 11, 2025 · Enter is.null, a function used in many programming environments to check if a value is null. While SQL doesn’t have a direct is.null function like some languages, it employs …