How to Delete a Trigger in MySQL

Contents
In this article, you will learn how to delete a trigger in MySQL.
Deleting a trigger in MySQL
In MySQL, a trigger is a database object that is associated with a table and automatically executes in response to certain events, such as INSERT, UPDATE, or DELETE operations. If you no longer need a trigger, you can delete it using the DROP TRIGGER statement.
Syntax
The basic syntax of deleting a trigger in MySQL is as follows:
DROP TRIGGER [IF EXISTS] trigger_name;
The DROP TRIGGER statement removes the trigger from the database. The IF EXISTS clause is optional and prevents an error from occurring if the trigger does not exist.
Examples
Deleting a trigger that audits INSERT operations
In this example, we will delete a trigger that audits INSERT operations on a table.
DROP TRIGGER IF EXISTS audit_insert;
This statement removes the trigger named audit_insert from the database. The IF EXISTS clause prevents an error from occurring if the trigger does not exist.
Deleting a trigger that enforces business rules
In this example, we will delete a trigger that enforces a business rule by preventing a row from being inserted if a certain condition is not met.
DROP TRIGGER IF EXISTS check_salary;
This statement removes the trigger named check_salary from the database. The IF EXISTS clause prevents an error from occurring if the trigger does not exist.
Deleting a trigger that maintains referential integrity
In this example, we will delete a trigger that maintains referential integrity by deleting all child rows when a parent row is deleted.
DROP TRIGGER IF EXISTS delete_child;
This statement removes the trigger named delete_child from the database. The IF EXISTS clause prevents an error from occurring if the trigger does not exist.