MySQL and mSQL 1st ed.

Such textbooks are very necessary, because if you delve into the topic, you can understand many complexities. I also want to recommend a useful article where you learn about mysql optimize table https://www.devart.com/dbforge/mysql/studio/optimize-mysql-table.html . By the way, the powerful dbForge Studio integration environment will help you with this, as it contains a complete set of necessary tools.