innodb鎖-不一樣索引下更新sql的加鎖過程

1、根據主鍵更新 mysql> start transaction; Query OK, 0 rows affected (0.00 sec) mysql> update test_user set status=1 where user_id=1; Query OK, 0 rows affected (0.00 sec) Rows matched: 1 Changed: 0 Warning

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