最左前缀 联合索引

以下SQL优化: 生产中有一个打印日志:print_log。id为主键,domain_id为二次索引 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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