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In this article, we will learn how to use triggers in sql. There is a certain reference value, friends in need can refer to, hope to help you.

The use of triggers

A trigger is a special stored procedure that executes automatically when a user attempts to execute a specified data modification statement on a specified table. You can use CREATE statements to create triggers, DROP statements to delete triggers, ALTER statements to disable triggers, and so on. Next, let's introduce it in detail.

Create trigger

CREATE TRIGGER tr_update_Stock

Delete trigger

DROP TRIGGER tr_update_Stock

Forbidden

ALTER TABLE trig_example DISABLE TRIGGER trig1GO

Restore

ALTER TABLE trig_example ENABLE TRIGGER trig1GO

Disable all triggers on a table

ALTER TABLE, your watch, DISABLE TRIGGER all.

Enable all triggers on a table

ALTER TABLE, your watch, enable TRIGGER all.

Disable all triggers on all tables

Exec sp_msforeachtable 'ALTER TABLE? DISABLE TRIGGER all'

Enable all triggers on all tables

Exec sp_msforeachtable 'ALTER TABLE? enable TRIGGER all'

The above is a brief introduction to the use of triggers in sql, of course, the detailed use of the above differences have to be used by everyone to understand. If you want to know more, welcome to follow the industry information channel!

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