Mysql5.7 in,exists,表直接關聯性能比較

mysql> select version(); +-----------+ | version() | +-----------+ | 5.7.9-log | +-----------+ 1 row in set (0.00 sec) 製造數據 DROP TABLE IF EXISTS test;  CREATE TABLE test(      ID INT(10) NOT NULL,   

>>阅读原文<<