Can you put a trigger on a view?
Can you put a trigger on a view?
Yes, you can create triggers on views. (Since at least SQL Server 2000.) If you create a trigger on a view, it won’t fire on inserts to the base table. If you want something to happen when you insert data into a base table, create a trigger on the base table.
Which trigger is used in views?
SQL Server Triggers on Views There are two kinds of DML triggers the FOR (or AFTER) trigger and the INSTEAD OF trigger, but the only one you can use with views are INSTEAD OF triggers. In contrary to the AFTER type which fires after an event, the INSTEAD OF trigger executes instead of the firing statement.
What is view and trigger in SQL?
Creates a DML, DDL, or logon trigger. A trigger is a special type of stored procedure that automatically runs when an event occurs in the database server. DML events are INSERT, UPDATE, or DELETE statements on a table or view. These triggers fire when any valid event fires, whether table rows are affected or not.
How do you view triggers?
To view database level triggers, Login to the server using SQL Server management studio and navigate to the database. Expand the database and navigate to Programmability -> Database Triggers. To view triggers at the server level, Login to Server using SSMS and navigate to Server Objects and then Triggers folder.
Which statement can a trigger not be based on?
Since triggers execute as part of a transaction, the following statements are not allowed in a trigger: All create commands, including create database, create table, create index, create procedure, create default, create rule, create trigger, and create view. All drop commands. alter table and alter database.
In which situation is it not possible to fire a DML trigger?
It is not possible to fire a DML trigger, when a row is selected. Triggers are implicitly fired by Oracle when a triggering event occurs, no matter which user is connected or which application is being used. DML triggers for event publication are associated with a table.
What are the types of trigger?
Types of Triggers
- Row Triggers and Statement Triggers.
- BEFORE and AFTER Triggers.
- INSTEAD OF Triggers.
- Triggers on System Events and User Events.
How do you know if a table has a trigger?
To view the definition of a DML trigger
- In Object Explorer, connect to an instance of Database Engine and then expand that instance.
- Expand the database that you want, expand Tables, and then expand the table that contains the trigger for which you want to view the definition.
Which of the following is a DML trigger?
DML triggers is a special type of stored procedure that automatically takes effect when a data manipulation language (DML) event takes place that affects the table or view defined in the trigger. DML events include INSERT, UPDATE, or DELETE statements.
Which is not allowed in a trigger?