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Next Section： in type subquery trap
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MySQL Optimization Video Tutorial—Boolean Education
Chapter1 MySQL optimization tutorial
1-1 Be specific in your answer
1-2 Table building principles
1-3 Column type selection
1-4 Index principle
1-5 hash index
1-6 Common misunderstandings about index building
1-7 Index classic topics
1-8 Index experiment
1-9 Clustered index and non-clustered index
1-10 Page split test
1-11 Index coverage
1-12 A classic topic on a forum
1-13 ideal index
1-14 Pseudo hash index
1-15 Principles of multi-column indexes
1-16 Indexing and sorting
1-17 Duplicate and redundant indexes
1-18 repair table
1-19 Query general principles
1-20 explain detailed explanation
1-21 in type subquery trap
1-22 Force the use of indexes
1-23 count and union
1-24 limit page turning optimization topic
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notes
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![Front-end project-Shangyou [HTML/CSS/JS technology comprehensive practice]](https://img.php.cn/upload/course/000/000/068/63bfcb2974f91471.jpg)
![Zero-based front-end course [Vue advanced learning and practical application]](https://img.php.cn/upload/course/000/000/068/63bbd15353895588.jpg)
![WEB front-end tutorial [HTML5+CSS3+JS]](https://img.php.cn/upload/course/000/000/068/63ba60c8da520536.jpg)
![Apipost practical application [api, interface, automated testing, mock]](https://img.php.cn/upload/course/000/000/068/63b3c967a20f4861.jpg)
