select * from riv_test where a=3 for update;X锁
select * from riv_test where a=3 lock in share mode;S锁
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转载于:https://www.cnblogs.com/tonggc1668/p/8011623.html
select * from riv_test where a=3 for update;X锁
select * from riv_test where a=3 lock in share mode;S锁
转载于:https://www.cnblogs.com/tonggc1668/p/8011623.html