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请问一个mysql索引的有关问题

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Release： 2016-06-13 13:37:47
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请教一个mysql索引的问题
使用联合主健
PRIMARY KEY (`aid`,`bid`)
关于bid的索引需要重新建一个吗？

------解决方案--------------------
和联合索引一样的，要看你的数据查询条件

如果需要仅根据bid找出数据，一般还是要建的，，，看情况，看数据规模，查询条件
------解决方案--------------------
需要重新建一个

Related labels：
key mysql
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