24 May 2022 Ignacio L. Bisso How to Use the COALESCE() Function in SQL SQL users are often faced with NULL values in their queries and need to process them properly. The COALESCE() function helps handle NULL values. Read this article to learn how to use COALESCE() in your queries. SQL tables store data in records, and records are composed of fields. There can be situations where we don’t know the value for a specific field. For example, let’s suppose we have a table with data for persons. Read more