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How do I create an oracle trigger?
And in this tutorial I am just giving the simple tutorial to how to create a trigger in Oracle Form’s object navigator. 1. Click on the Triggers node just below the Form name and then click on + icon. 2. Then Trigger Dialog window will open then select trigger you want to create and click on OK button.
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.
How do you delete trigger in SQL?
To delete 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 that you want to delete. Expand Triggers, right-click the trigger to delete, and then click Delete.
What is an example of a database trigger?
The trigger is mostly used for maintaining the integrity of the information on the database. For example, when a new record (representing a new worker) is added to the employees table, new records should also be created in the tables of the taxes, vacations and salaries.
Can a trigger trigger another trigger?
A trigger can also contain INSERT, UPDATE and DELETE logic within itself, so when the trigger is fired because of data modification it can also cause another data modification, thereby firing another trigger. A trigger that contains data modification logic within itself is called a nested trigger.
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.
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.