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 column. Note …

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 …

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.

Learn how to use SQL IS NULL to filter missing values. See syntax, usage examples, and best practices for querying NULLs.

NULL Handling in SQL refers to managing unknown or missing values using operators like IS NULL and IS NOT NULL, since direct comparisons like = NULL do not work. NULL represents the absence of a …

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.

Summary: in this tutorial, you will learn about NULL and three-valued logic in SQL Server. You will also learn how to use IS NULL and IS NOT NULL operators to test whether a value is NULL or not. In the …