数据库课程实现原理的相关内容

文章 2023-11-09 来自：开发者社区

数据库系列课程（17）-索引实现原理（小结）

引言什么是索引？答：是帮助MySQL高效获取数据的数据结构。什么是全表扫描？答：是将整张表扫描一遍，效率非常低。本文言简意赅的总结索引的几种实现原理：hash算法平衡二叉树（AVL树）B树实现B+树实现（MyISAM和InnoDB使用）hash算法原...

文章 2023-11-08 来自：开发者社区

数据库系列课程（10）-MySQL索引实现原理

1. 引言MySQL官方对索引的定义为：索引（Index）是帮助 MySQL 高效获取数据的数据结构。白话文：索引就像书的目录一样可以非常快速的定位到书的页码。如果向mysql发出一条sql语句请求，查询的字段没有创建索引的话，可能会导致全表扫描，这样的话查询效率非常低。那么MySQL中索引采用的是...

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