Triggers vs. stored procedures
One important task when you take ownership of an existing database is to familiarize yourself with the objects that comprise the database.
This task includes getting to know existing procedures, functions, and triggers.
You find the following objects in the Fresh Fruit Delivery database:
The company uses a regular stored procedure,
MonthlyOrders, for reporting purposes. The stored procedure sums up order amounts for each product every month.The trigger
CustomerDiscountHistoryis used to keep a history of the changes that occur in theDiscountstable. The trigger is fired when updates are made to theDiscountstable, and it stores the old and new values from theDiscountcolumn into the tableDiscountsHistory.
Este exercício faz parte do curso
Building and Optimizing Triggers in SQL Server
Exercício interativo prático
Experimente este exercício completando este código de exemplo.
-- Run an update for some of the discounts
___ Discounts
SET Discount = Discount + 1
WHERE Discount <= 5;
-- Verify the trigger ran successfully
___ * FROM DiscountsHistory;