Chapter 6 Assignment Exercises

Chapter 6 Assignment Exercises - CLINTRICIA BAKER ITSE 2409...

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/* CLINTRICIA BAKER - ITSE 2409 DATABASE PROGRAMMING */ /* CHAPTER 6 HOW TO CODE SUBQUERIES */ /*ex6-1*/ SELECT DISTINCT CategoryName FROM Categories WHERE CategoryID IN (SELECT CategoryID FROM Products) ORDER BY CategoryName /* ex6-2 pg 196 */ SELECT ProductName, ListPrice FROM Products WHERE ListPrice > (SELECT AVG (ListPrice) FROM Products) ORDER BY ListPrice DESC /* ex6-3 pg 198 */ SELECT DISTINCT CategoryName FROM Categories WHERE NOT EXISTS (SELECT CategoryID FROM Products WHERE Categories.CategoryID = CategoryID) ORDER BY CategoryName /* ex6-4 pg */ /* I could not figure this one out SELECT EmailAddress, OrderID, COUNT (*) AS OrderTotal FROM Customers, OrderItems GROUP BY EmailAddress, OrderID
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Unformatted text preview: SELECT EmailAddress, MAX(OrderID) FROM (SELECT EmailAddress, OrderID, Count (*) AS OrderTotal FROM Customers, OrderItems GROUP BY EmailAddress, OrderID) */ /* ex6-5 */ SELECT p1.ProductName, p1.DiscountPercent FROM Products AS p1 WHERE p1.DiscountPercent NOT IN (SELECT p2.DiscountPercent FROM Products AS p2 WHERE p1.ProductName <> p2.ProductName) ORDER BY ProductName /* ex6-6 */ /* I could not figure this one out SELECT c.EmailAddress AS EmailAddress, o.OrderId AS OrderId, o.OrderDate AS OrderDate FROM Customers c JOIN Orders o ON c.CustomerID = CustomerID AND o.OrderDate = (SELECT MIN(OrderDate) FROM Orders WHERE CustomerID = c.CustomerID) */...
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