如果 MySQL 中存在触发器，则删除触发器？

DROP TRIGGER IF EXISTS yourTriggerName;

Mysql> show triggers;

+-------------+--------+---------------+------------------------------------------------------------------------+--------+------------------------+--------------------------------------------+---------+----------------------+----------------------+--------------------+
| Trigger     | Event   | Table        | Statement                                                              | Timing |Created                 | sql_mode                                   |  Definer                 | character_set_client | collation_connection | Database Collation |
+-------------+--------+---------------+------------------------------------------------------------------------+--------+------------------------+--------------------------------------------+---------+----------------------+----------------------+--------------------+
| CheckSalary | INSERT | employeetable | if new.EmployeeSalary < 1000 then setnew.EmployeeSalary = 10000;end if | BEFORE | 2018-12-31 17:33:29.54 |STRICT_TRANS_TABLES,NO_ENGINE_SUBSTITUTION | root@% | utf8 |utf8_general_ci | utf8mb4_0900_ai_ci |
+-------------+--------+---------------+------------------------------------------------------------------------+--------+------------------------+--------------------------------------------+---------+----------------------+----------------------+--------------------+
1 row in set (0.17 sec)

mysql> drop trigger if exists CheckSalary;
Query OK, 0 rows affected (0.30 sec)

mysql> show triggers;
Empty set (0.00 sec)