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组合索引应该如何设计

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组合索引应该如何设计

条件name
条件name，time
条件name，age
条件name，time，age
条件name，time，age，code

可能的条件查询由上面几种，应该设置1个单列索引和4个组合索引吗


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by (71.8m points)

可以设置一个联合索引(name,time,age,code)
根据最左原则，在联合索引中将选择性最高的列放在索引最前面


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