『管理調優』查看數據庫中有無多餘的索引SQL

原創 Chrisjian 2020-07-01 21:05
查看數據庫中有無多餘的索引，即一個索引的字段爲另一個索引的前幾個字段。如index1的定義爲test(filed1,filed2),index2的定義爲test(filed1,filed2,filed3)，則認爲index1是多餘的。(摘自Ixora)
 
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