trigger_name is the name of the new trigger.schema_name (optional) is the name of the schema where the new trigger will be created.Use the CREATE TRIGGER statement to create a trigger in SQL Server. Logon trigger is invoked when a LOGON event is raised when a user session is established.ĭML (Data Manipulation Language) trigger is automatically invoked when an INSERT, UPDATE or DELETE statement is executed on a table.It is fired in response to a server scoped or database scoped event. DDL triggers are automatically invoked when a CREATE, ALTER, or DROP event occurs in a database.DML triggers are automatically fired when an INSERT, UPDATE or DELETE event occurs on a table.There are three types of triggers in SQL Server ![]() You can create a trigger to automatically insert updated employee data to the new audit table whenever the Employee table's value is updated. You might want to preserve the previous salary details in a separate audit table before it gets updated to its new value. ![]() There are different kinds of events that can activate a trigger like inserting or deleting rows in a table, a user logging into a database server instance, an update to a table column, a table is created, altered, or dropped, etc.įor example, consider a scenario where the salary of an employee in the Employee table is updated. The trigger is a database object similar to a stored procedure that is executed automatically when an event occurs in a database. ![]() SQL Server - GRANT/REVOKE Permissions to User.
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