If/Then Statement

If/Then Statement

I am building an e-commerce site with SQL as the database. When an order is placed, how do I have the database set the HandlingCharge column to 5 if the SubTotal is less than 30 and 0 if it’s greater than 30?

To update the HandlingCharge column, create an insert trigger that checks the value of the Subtotal column. I created this test table called TestOrders:

ID intSubtotal moneyHandlingCharge money

This trigger handles updating the HandlingCharge column with either a 5 or a 0:

CREATE TRIGGER TestOrders_INS ON [TestOrders] FOR INSERTASIF (SELECT Subtotal FROM inserted) < 30  UPDATE TestOrders  SET HandlingCharge = 5  FROM TestOrders, inserted  WHERE TestOrders.ID = inserted.IDELSE  UPDATE TestOrders  SET HandlingCharge = 0  FROM TestOrders, inserted  WHERE TestOrders.ID = inserted.ID

The inserted table is a special table available only in a trigger that contains the rows that are being inserted or updated.

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