A trigger is a sort of stored procedure that executes automatically when a database server event occurs. When a user attempts to edit data via a data manipulation language (DML) event, DML triggers are triggered. INSERT, UPDATE, and DELETE statements on a table or view are DML events. Data definition language (DDL) triggers are run in response to a range of DDL events. The CREATE, ALTER, and DROP statements in Transact-SQL, as well as some system stored procedures that perform DDL-like actions, are the most common triggers for these events.

Triggers are used to maintain data integrity by checking or modifying data in a consistent manner. A trigger is a collection of SQL statements that can be used by many applications. When numerous programs need to do the same database operation, it allows you to avoid writing redundant code.

We may create four different sorts of triggers in SQL Server. Triggers for the Data Definition Language (DDL), the Data Manipulation Language (DML), the CLR, and the Logon.

Yes, you will get a certificate of completion for SQL Triggers after completing all the modules and cracking the assessment. The assessment tests your knowledge of the subject and badges your skills.
 

It is an entirely free course from Great Learning Academy. Anyone interested in learning the basics of SQL Triggers can get started with this course.
 

Once you enroll in the SQL Triggers course, you have lifetime access to it. So, you can log in anytime and learn it for free online.