『管理调优』查看数据库中有无多余的索引SQL

原創 Chrisjian 2020-07-01 21:05
查看数据库中有无多余的索引，即一个索引的字段为另一个索引的前几个字段。如index1的定义为test(filed1,filed2),index2的定义为test(filed1,filed2,filed3)，则认为index1是多余的。(摘自Ixora)
 
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