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Which of the following trigger is executed after inserting the data into the table?
The columns can be prefixed by :OLD and :NEW for old and new values. Triggers on DML statements include the following triggers: BEFORE INSERT and AFTER INSERT triggers fire for each row inserted into the table. BEFORE UPDATE and AFTER UPDATE triggers fire for each row updated in the table.
What are the after trigger?
An after trigger runs after the corresponding insert, update, or delete changes are applied to the table. The WHEN condition can be used in an SQL trigger to specify a condition. If the condition evaluates to true, the SQL statements in the SQL trigger routine body are run.
How do you delete a trigger in SQL?
Expand the database that you want, expand Tables, and then expand the table that contains the trigger that you want to delete. Expand Triggers, right-click the trigger to delete, and then click Delete. In the Delete Object dialog box, verify the trigger to delete, and then click OK.
What are the types of triggers?
The different types of triggers are: – Row triggers and statement triggers – specifies how many times the trigger should get executed – Once for every row or once for every triggering statement. – Before and after triggers – Before trigger is fired before and update, insert or triggering statement is executed.
What is an example of a trigger in SQL?
A SQL trigger is a database object just like a stored procedure, or we can say it is a special kind of stored procedure which fires when an event occurs in a database. We can execute a SQL query that will “do something” in a database when an event is fired. For example, a trigger can be set on a record insert in a database table.
What is a trigger in Oracle?
What is an Oracle trigger. A trigger is a named PL/SQL block stored in the Oracle Database and executed automatically when a triggering event takes place. The event can be any of the following: A data manipulation language ( DML ) statement executed against a table e.g., INSERT, UPDATE, or DELETE.