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This article mainly introduces which triggers are in mysql, which can be used for reference by friends who need them. I hope you will learn a lot after reading this article. Next, let the editor take you to learn about it.

There are six kinds of mysql triggers, which are: 1, Before Insert;2, After Insert;3, Before Update;4, After Update;5, Before Delete;6, After Delete.

A trigger is a piece of code that executes automatically when an event is triggered.

There are six types of triggers in the MySQL database:

Before Insert

After Insert

Before Update

After Update

Before Delete

After Delete

Use the scene:

Cascading changes can be achieved through related tables in the database

Deal with the changes of the fields in the real-time monitoring table accordingly.

Note: abuse can make it difficult to maintain databases and applications

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