beginner SQL statement

Question

I'm building a commission report that needs to include custom shipping rates if they are present in the order. Below I have two tables joined. If OrderDetails.Custom contains 'Freight' or 'Overnight' I need it to display 'OrderDetails.CustomPrice'.

If OrderDetails.Custom does not contain 'Freight' or 'Overnight' I need it to leave OrderDetails.CustomPrice blank but still display all the other fields as long as the WHERE clause is met.

Any help is greatly appreciated!

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SELECT Orders.OrderDate, Orders.OrderID,      Orders.PaymentAmount, 
       Orders.Shipping,  OrderDetails.Custom, OrderDetails.CustomPrice  
FROM Orders
  JOIN OrderDetails 
    ON OrderDetails.OrderID = Orders.OrderID
WHERE OrderDate BETWEEN '04/01/12 00:00:01' 
                    AND '04/30/12 11:59:59' 
  AND SalesRep_CustomerID = '21140';

Answer 1

You can achieve what you want with a case statement :

SELECT Orders.OrderDate, Orders.OrderID, Orders.PaymentAmount, Orders.Shipping, 
CASE WHEN (OrderDetails.Custom = 'Freight' OR OrderDetails.Custom = 'Overnight') THEN OrderDetails.CustomPrice ELSE '' END AS  CustomPrice,
 OrderDetails.CustomPrice  
FROM Orders
JOIN OrderDetails ON OrderDetails.OrderID = Orders.OrderID
WHERE OrderDate BETWEEN '04/01/12 00:00:01' AND '04/30/12 11:59:59' and SalesRep_CustomerID = '21140';

Answer 2

Use case statement to get the value for the column "CustomPrice"