The language is T-SQL
The Northwind Database diagrams are shown below
This script must not make lasting changes to the database. It should be re-runnable and produce the same results each time. You will need to delete from more than one table due to existing Foreign Key constraints. It is sort of a foreign key chain reaction example. DO NOT HARD CODE ANY IDs in your queries. a. Use the Northwind database b. show the Employeeld, Lastame, FirstName and Title of the employees whose last name starts with K c. Within a transaction, delete only the necessary rows to remove the employee whose last name starts with K d. Within the transaction, run the query from step (b) above to demonstrate the target row has been removed e. Now rollback any changes that have been made f. After the rollback, run the query from (b) to show that no permanent changes were made. Here are the expected results ... Employeeld LastName First Name Title 7 Sales Representative King Robert Employeeld Last Name First Name Title Employeeld Last Name King First Name Robert Title Sales Representative Condensed Type Allow Nulls Identity int Order Details Column Name Condensed Type Allow Nulls Identity 8 OrderlD int 9 ProductID int UnitPrice money Quantity smallint Discount real nvarchar(40) Categories Column Name Condensed Type Allow Nulls Identity 9 CategoryID int CategoryName nvarchar(15) Description ntext Picture image int 000000 Products Column Name 8 ProductID Product Name SupplierlD CategoryID QuantityPerUnit UnitPrice UnitsinStock UnitsOnOrder ReorderLevel 00000 int nvarchar(20) money smallint smallint smallint 00000000000 8 Identity Discontinued bit Employee Territories Column Name Condensed Type Allow Nulls Identity 9 Employeeld TerritoryID nvarchar(20) int Customers Column Name Condensed Type Allow Nulls 9 CustomerlD nchar(5) CompanyNa... nvarchar(40) Contact Name nvarchar(30) Contact Title nvarchar(30) Address nvarchar(60) M City nvarchar(15) Region nvarchar(15) PostalCode nvarchar(10) Country nvarchar(15) Phone nvarchar(24) Fax nvarchar(24) OOO |TOO Territories Column Name Condensed Type Allow Nulls Allow Nulls Identity 8 TerritoryID nvarchar(20) TerritoryDescription nchar(50) RegionID int Suppliers Column Name Condensed Type Allow Nulls Identity Suppliers int CompanyName nvarchar(40) ContactName nvarchar(30) Contact Title nvarchar(30) M Address nvarchar(60) City nvarchar(15) Region nvarchar(15) PostalCode nvarchar(10) Country nvarchar(15) Phone nvarchar(24) M Fax nvarchar(24) HomePage ntext 000 Region Column Name Condensed Type Allow Nulls Identity 9 RegionID int RegionDescription nchar(50) 000 CustomerCustomerDemo Column Name Condensed Type Allow Nulls Identity 9 CustomerlD nchar(5) CustomerTypeID nchar(10) Employees Column Name Condensed Type Allow Nulls Identity Employeeld int LastName nvarchar(20) FirstName nvarchar(10) Title nvarchar(30) TitleOfCourtesy nvarchar(25) BirthDate datetime HireDate datetime Address nvarchar(60) City nvarchar(15) Region nvarchar(15) PostalCode nvarchar(10) M Country nvarchar(15) HomePhone nvarchar(24) Extension nvarchar(4) Photo image OOOOOOOOOOOOOOOOOOO Orders Column Name Condensed Type Allow Nulls Identity od 9 OrderD int CustomerlD nchar(5) Employeeld int OrderDate datetime RequiredDate datetime ShippedDate datetime ShipVia int Freight money ShipName nvarchar(40) ShipAddress nvarchar(60) Ship City nvarchar(15) Ship Region nvarchar(15) ShipPostalCode nvarchar(10) Ship Country nvarchar(15) D Customer Demographics Column Name Condensed Type Allow Nulls Identity CustomerTypeID nchar(10) CustomerDesc ntext 000 ntext Notes Reports To PhotoPath int nvarchar(255) Shippers Column Name Condensed Type Allow Nulls Identity 8 ShipperID int CompanyName nvarchar(40) Phone nvarchar(24)
