最左前綴 聯合索引

如下SQL優化： 生產中有一個打印日誌：print_log。id爲主鍵，domain_id爲二次索引 EXPLAIN select o.* FROM print_log o WHERE o.domain_id = 10091 AND o.deleteVersion = 0 AND o.operatedTime > ‘2017-10-01’ AND o.receiverPerson LIKE con

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