mysql优化（索引底层，使用索引，explain作用，索引失效）

淩亂°似流年 2021-11-06 01:58 511阅读 0赞

### 文章目录 ###

*  推荐按序号步骤进行查看。
 *   *  1.索引底层原理：\[https://blog.csdn.net/javawcj123/article/details/79824020\](https://blog.csdn.net/javawcj123/article/details/79824020)
     *  2.如何使用索引：\[https://blog.csdn.net/tomorrow\_fine/article/details/78337735\](https://blog.csdn.net/tomorrow\_fine/article/details/78337735)
     *  3.explain作用：\[https://blog.csdn.net/why15732625998/article/details/80388236\](https://blog.csdn.net/why15732625998/article/details/80388236)
     *  4.索引失效（1）：\[https://blog.csdn.net/student\_\_software/article/details/82078786\](https://blog.csdn.net/student\_\_software/article/details/82078786)
     *  5.索引失效（2）：\[https://blog.csdn.net/hehexiaoxia/article/details/54312130\](https://blog.csdn.net/hehexiaoxia/article/details/54312130)
     *  6.索引失效（3）：\[https://blog.csdn.net/DWL0208/article/details/83448520\](https://blog.csdn.net/DWL0208/article/details/83448520)
     *  7.SQL优化：\[https://blog.csdn.net/hguisu/article/details/5731629\](https://blog.csdn.net/hguisu/article/details/5731629)

# 推荐按序号步骤进行查看。 #

## 1.索引底层原理：[https://blog.csdn.net/javawcj123/article/details/79824020][https_blog.csdn.net_javawcj123_article_details_79824020] ##

## 2.如何使用索引：[https://blog.csdn.net/tomorrow\_fine/article/details/78337735][https_blog.csdn.net_tomorrow_fine_article_details_78337735] ##

## 3.explain作用：[https://blog.csdn.net/why15732625998/article/details/80388236][https_blog.csdn.net_why15732625998_article_details_80388236] ##

## 4.索引失效（1）：[https://blog.csdn.net/student\_\_software/article/details/82078786][https_blog.csdn.net_student_software_article_details_82078786] ##

## 5.索引失效（2）：[https://blog.csdn.net/hehexiaoxia/article/details/54312130][https_blog.csdn.net_hehexiaoxia_article_details_54312130] ##

## 6.索引失效（3）：[https://blog.csdn.net/DWL0208/article/details/83448520][https_blog.csdn.net_DWL0208_article_details_83448520] ##

## 7.SQL优化：[https://blog.csdn.net/hguisu/article/details/5731629][https_blog.csdn.net_hguisu_article_details_5731629] ##

[https_blog.csdn.net_javawcj123_article_details_79824020]: https://blog.csdn.net/javawcj123/article/details/79824020
[https_blog.csdn.net_tomorrow_fine_article_details_78337735]: https://blog.csdn.net/tomorrow_fine/article/details/78337735
[https_blog.csdn.net_why15732625998_article_details_80388236]: https://blog.csdn.net/why15732625998/article/details/80388236
[https_blog.csdn.net_student_software_article_details_82078786]: https://blog.csdn.net/student__software/article/details/82078786
[https_blog.csdn.net_hehexiaoxia_article_details_54312130]: https://blog.csdn.net/hehexiaoxia/article/details/54312130
[https_blog.csdn.net_DWL0208_article_details_83448520]: https://blog.csdn.net/DWL0208/article/details/83448520
[https_blog.csdn.net_hguisu_article_details_5731629]: https://blog.csdn.net/hguisu/article/details/5731629