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What are 3 types of SQL triggers?
There are three types of triggers in SQL Server.
- DDL Trigger.
- DML Trigger.
- Logon Trigger.
For which DDL events can triggers be created?
DDL triggers fire in response to a variety of Data Definition Language (DDL) events. These events primarily correspond to Transact-SQL statements that start with the keywords CREATE, ALTER, DROP, GRANT, DENY, REVOKE or UPDATE STATISTICS.
What events will fire a DDL trigger for SQL Server?
SQL Server DDL triggers respond to server or database events rather than to table data modifications. These events created by the Transact-SQL statement that normally starts with one of the following keywords CREATE , ALTER , DROP , GRANT , DENY , REVOKE , or UPDATE STATISTICS .
What is the difference between DML triggers and DDL triggers?
What is the difference between a DDL trigger and a DML trigger? A DDL trigger executes in response to a change to the structure of a database (for example, CREATE, ALTER, DROP). A DML trigger executes in response to a change in data (INSERT, UPDATE, DELETE).
How does a DDL trigger work in SQL Server?
Summary: in this tutorial, you will learn how to use the SQL Server data definition language (DDL) trigger to monitor the changes made to the database objects. SQL Server DDL triggers respond to server or database events rather than to table data modifications.
Can a DDL event be used in SQL Server?
Applies to: SQL Server (all supported versions) Azure SQL Database The following tables list the DDL events that can be used to fire a DDL trigger or event notification. Note that each event corresponds to a Transact-SQL statement or stored procedure, with the statement syntax modified to include an underscore character (_) between keywords.
What are the different types of DDL triggers?
Types of DDL Triggers. Transact-SQL DDL Trigger. A special type of Transact-SQL stored procedure that executes one or more Transact-SQL statements in response to a server-scoped or database-scoped event. For example, a DDL Trigger may fire if a statement such as ALTER SERVER CONFIGURATION is executed or if a table is deleted by using DROP TABLE.
When do DDL triggers or event notifications occur?
DDL triggers or event notifications can be created to fire in response to the following events when they occur in the database in which the trigger or event notification is created, or anywhere in the server instance.