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 …

Return the specified value IF the expression is NULL, otherwise return the expression: Well organized and easy to understand Web building tutorials with lots of examples of how to use …

In this example, if listing.OfferText is NULL, the LEN () function should also return NULL, but that's still not > 0. Update. I've learned some things in the 5 1/2 years since posting this, and …

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.

Jan 31, 2024 · In a Table Column sometimes there can be no actual or valid data and it could be NULL or Empty ('') or some space value saved. There are many methods or functions to …

Dec 19, 2024 · Learn how to manage null and empty values in SQL Server. Discover various methods, including using IS NULL, COALESCE and ISNULL functions, with practical examples

Apr 7, 2025 · Thankfully, there are a few SQL Server functions devoted to handling NULL values. Let’s look at two of them. The first, NULLIF, will help you to return a NULL value. The second, …

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 …

1 day ago · In SQL Server, handling string data often requires checking whether a column contains `NULL` values or empty strings (`''`). These two scenarios—`NULL` (absence of data) …

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 …