如果 MySQL 中存在触发器,则删除触发器?
要删除触发器,请使用DROP命令。语法如下 −
DROP TRIGGER IF EXISTS yourTriggerName;登录后复制
要检查触发器是否存在,您可以使用以下查询。我们的数据库中有一个触发器−
mysql> show triggers;登录后复制
+-------------+--------+---------------+------------------------------------------------------------------------+--------+------------------------+--------------------------------------------+---------+----------------------+----------------------+--------------------+ | Trigger | Event | Table | Statement | Timing |Created | sql_mode | Definer | character_set_client | collation_connection | Database Collation | +-------------+--------+---------------+------------------------------------------------------------------------+--------+------------------------+--------------------------------------------+---------+----------------------+----------------------+--------------------+ | CheckSalary | INSERT | employeetable | if new.EmployeeSalary 登录后复制