Saturday, August 21, 2021

MySQL: Understanding EXPLAIN

Have you ever sought out advice regarding query performance? EXPLAIN. Want to know what your queries do on a deeper level? EXPLAIN. Want to know what index is used by your query? EXPLAIN. After reading this blog post, you should understand the importance of this keyword (if you don't already).

How to Use EXPLAIN

To use EXPLAIN in its simplest form, append the keyword to the beginning of your query like so:



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