Question

Question for SQL in MS SQL Server Management Studio (Please don't use where clause for Joins use from clause)

Need to Create a Query because Northwind Traders has decided to increase their retail prices. Write a query that shows the product name, the current price, and the new price. Make sure the new price is listed to 2 decimal points. Follow below guidelines on new retail price:

a.         If the category is beverages or dairy products, increase the price by 20%.

b.         If the category is meat/poultry or seafood, increase the price by 15%.

c.         If the Supplier is New Orleans Cajun Delights, increase the price by 8%.

d.         No other prices should be increased – list the current price.

Customers PK Customer D CompanyName Contact Name Contact Title Address City State OrRegion PostalCode Country Phone char(5) varchar(40) varchar(30) varchar(30) varchar(60) varchar(15) varchar(15) varchar(10) varchar(15) varchar(24) varchar(24) Order Details Orders PK OrderID int FK CustomerlD char(5) FK Employeeld int Order Date datetime Required Date datetime ShippedDate datetime FK ShipVia int Freight money ShipName varchar(40) ShipAddress varchar(60) Ship City varchar(15) ShipStateOrRegion varchar(15) ShipPostalCode varchar(10) ShipCountry varchar(15) int Fax PK,FK OrderID PK,FK ProductID UnitPrice Quantity Discount int money smallint decimal(3.2) Products Employees PK Employeeld int LastName varchar(20) FirstName varchar(10) Job Title varchar(30) Birth Date date Hire Date date Termination Date date Address varchar(60) City varchar(15) StateOrRegion varchar(15) PostalCode varchar(10) Country varchar(15) Home Phone varchar(24) Extension varchar(4) EmailAddress varchar(100) Notes varchar(max) FK Reports To int Shippers PK ShipperID int CompanyName varchar(40) Phone varchar(24) Suppliers PK Supplier D int CompanyName varchar(40) ContactName varchar(30) Contact Title varchar(30) Address varchar(60) City varchar(15) State OrRegion varchar(15) PostalCode varchar(10) Country varchar(15) Phone varchar(24) Fax varchar(24) PK ProductID int ProductName varchar(40) FK SupplierID int FK CategoryID int QuantityPerUnit varchar(20) UnitPrice money Wholesale Price money UnitsInStock smallint Units OnOrder smallint ReorderLevel smallint Discontinued bit Employee Territories PK,FK Employeeld int PK,FK TerritoryID int Territories PK TerritoryID int Territory Description varchar(50) FK RegionID int Categories PK CategoryID int CategoryName varchar(15) Description varchar(max) Region PK RegionID RegionDescription varchar(50) int

Answer 1

a) update Products UnitPrice=UnitPrice+(UnitPrice*20/100) where (Categories.CategoryID=Products.CategoryID AND CategoryName in (beverages,dairy products))

b) update Products UnitPrice=UnitPrice+(UnitPrice*15/100) where (Categories.CategoryID=Products.CategoryID AND CategoryName in (meat,poultry,sea food))

c) update Products UnitPrice=UnitPrice+(UnitPrice*8/100) where (Suppliers.SuppliersID=Products.SuppliersID AND SupplierName = New Orleans Cajun Delights)

d) select ProductID,UnitPrice from Products