Let MySQL automatically run logic when specific changes happen to your data.
A trigger is database logic that automatically runs when certain events happen to a table, such as an INSERT, UPDATE, or DELETE. This can be useful for automatically recording changes, maintaining related data, or enforcing specific database-level rules.
Triggers can be powerful, but they also hide behavior from the application code. If too much business logic is placed inside triggers, debugging and maintaining the system can become difficult because a simple database operation may cause additional changes behind the scenes.
What you'll walk away knowing
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