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互联网公司面试必问的mysql题目(下)

 5 years ago
source link: https://juejin.im/post/5ba1f32ee51d450e805b43f2
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这是mysql系列的下篇,上篇文章地址我附在文末。 什么是数据库索引?索引有哪几种类型?什么是最左前缀原则?索引算法有哪些?有什么区别? 索引是对数据库表中一列或多列的值进行排序的一种结构。一个非常恰当的比喻就是书的目录页与书的正文内容之间的关系,为了方便查找

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