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 NULL transformation 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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Receive a copy of my ebook, “10 MySQL Tips For Everyone”, absolutely free when you subscribe to the OpenLampTech newsletter.
The Newsletter for PHP and MySQL Developers
Receive a copy of my ebook, “10 MySQL Tips For Everyone”, absolutely free when you subscribe to the OpenLampTech newsletter.
Disclosure: Some of this blog post’s services and product links are affiliate links. At no additional cost to you, should you make a purchase by clicking through one of them, I will receive a commission.