Being mindful of NULL values is a good practice. NULLs can slip up on you and give you a heck of a time (especially in calculations) if you aren’t careful. In this post, we will see examples of NULLtransformation with the MySQL COALESCE() function.
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MySQL COALESCE() function accepts multiple arguments and returns the first non-NULL value. If there aren’t any non-NULLs, the COALESCE() returns NULL.
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Read the entire post, Transform NULL values with the MySQL COALESCE function to learn how to substitute NULL values for something more meaningful in query results.
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Josh Otwell has a passion to study and grow as a SQL Developer and blogger. Other favorite activities find him with his nose buried in a good book, article, or the Linux command line. Among those, he shares a love of tabletop RPG games, reading fantasy novels, and spending time with his wife and two daughters.
Disclaimer: The examples presented in this post are hypothetical ideas of how to achieve similar types of results. They are not the utmost best solution(s). The majority, if not all, of the examples provided, are performed on a personal development/learning workstation environment and should not be considered production quality or ready. Your particular goals and needs may vary. Use those practices that best benefit your needs and goals. Opinions are my own.
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