Contents
Can a trigger written for a view?
You can write triggers that fire whenever one of the following operations occurs: DML statements ( INSERT , UPDATE , DELETE ) on a particular table or view, issued by any user. DDL statements ( CREATE or ALTER primarily) issued either by a particular schema/user or by any schema/user in the database.
How do you write a insert trigger?
In this syntax: First, specify the name of the trigger that you want to create after the CREATE TRIGGER keywords. Second, use AFTER INSERT clause to specify the time to invoke the trigger. Third, specify the name of the table on which you want to create the trigger after the ON keyword.
Can we create a trigger on multiple tables?
SQL Server allows multiple triggers on the table for the same event and there is no defined order of execution of these triggers. We can set the order of a trigger to either first or last using procedure sp_settriggerorder. There can be only one first or last trigger for each statement on a table.
How to create a trigger after insert in SQL?
Code language: SQL (Structured Query Language) (sql) In this syntax: First, specify the name of the trigger that you want to create after the CREATE TRIGGER keywords. Second, use AFTER INSERT clause to specify the time to invoke the trigger. Third, specify the name of the table on which you want to create the trigger after the ON keyword.
What can you do with trigger on view?
By using INSTEAD OF triggers, we can change the behavior of INSERT, UPDATE and DELETE statements for a given view. In other words, we can perform certain validations before making a change to the data.
How to insert a trigger into a reminder table?
Finally, inside the trigger body, insert a new row into the reminder table if the birth date of the member is NULL. We inserted two rows into the members table. However, only the first row that has a birth date value NULL, therefore, the trigger inserted only one row into the reminders table.
Can you change old values after insert trigger?
Code language: SQL (Structured Query Language) (sql) In an AFTER INSERT trigger, you can access the NEW values but you cannot change them. Also, you cannot access the OLD values because there is no OLD on INSERT triggers.