Problem 4
What’s wrong with this query?
SELECT O.Order_ID,
O.Order_Date, C.Name, L.Line_ID, L.Quantity, I.Name
FROM Orders O, Order_Types T, Order_Lines L,
Items I, Customers C
WHERE O.Customer_ID =
:B1
AND L.Order_ID =
O.Order_ID
AND
I.Item_ID = L.Item_ID
AND C.Customer_ID =
O.Customer_ID
GROUP BY O.Order_ID,
O.Order_Date, C.Name, L.Line_ID, L.Quantity, I.Name;