1.MYSQL:

查看所有触发器:

SHOW TRIGGERS;

删除触发器:

drop trigger trigger_name;

注:当你执行drop table时，表上的触发器也被drop掉了

2.Oracle

查看数据库中已有触发器:

Select object_name From user_objects Where object_type=‘TRIGGER‘;

查询某个表的触发器:

select * from all_triggers WHERE table_name=‘表名‘;

3.SqlServer

查看数据库中已有触发器:

select name from sysobjects where xtype=‘TR‘ 

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SqlServer:

select name from sysobjects where xtype=‘TR‘ --所有触发器
select name from sysobjects where xtype=‘P‘ --所有存储过程
select name from sysobjects where xtype=‘V‘ --所有视图
select name from sysobjects where xtype=‘U‘ --所有表

Oracle : 
Select object_name From user_objects Where object_type=‘TRIGGER‘; --所有触发器
Select object_name From user_objects Where object_type=‘PROCEDURE‘; --所有存储过程
Select object_name From user_objects Where object_type=‘VIEW‘; --所有视图
Select object_name From user_objects Where object_type=‘TABLE‘; --所有表

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SQL之查看触发器

原文：https://www.cnblogs.com/yaoze2018/p/11006914.html