What does mysql trigger mean?

This article mainly gives you a brief introduction to what mysql triggers are. I hope it will be helpful to friends in need!

The trigger is a special stored procedure. The stored procedure needs to be called manually, while the trigger is automatically initiated by the program, such as deleting a table. before executing the trigger. It can be set to be executed before or after addition and deletion operations.

To put it simply, something happens to a table (insert, delete, update operations), and then the execution of several pre-written SQL statements is automatically triggered;

mysql trigger characteristics and functions

Features: The operation that triggers the event and the SQL statement in the trigger are a transaction operation, which is atomic, either all of them are executed, or none of them are executed. ;

Function: Ensure data integrity and act as a constraint;

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