A trigger allows you to execute a batch of SQL code when an insert, update or delete command is run against a specific table as TRIGGER is said to be the set of actions that are performed whenever commands like insert, update or delete are given through queries.
The trigger is said to be activated when these commands are given to the system.
Triggers are the particular type of stored procedures that are defined to execute automatically in place or after data modifications.
Triggers are generated using CREATE TRIGGER statement.