Instructor Inputs - Session 15 doc

To create the temporary table, John needs to execute the following statements in the SQL Server Management Studio: CREATE TABLE Temp ProductID int, AttChangeCost money, AttTime datet

Instructor Inputs S e

¤NIIT Instructor Inputs 15.3

This session includes exercises of Chapter 8, Chapter 9, and Chapter 10

Exercise 1

The management of AdventureWorks, Inc has decided that no user should be able to

change the prices of the products In addition, management wants that all the attempts to

change the price should be saved in a temporary table, Temp John, the database

developer has been asked to make the significant changes in the database to implement

this policy What can John do to achieve the same?

Solution

To accomplish this task, John needs to create an update trigger on the ProductCostHistory

table In addition, he also needs to create a temporary table to store the changes in it

To create the temporary table, John needs to execute the following statements in the SQL

Server Management Studio:

CREATE TABLE Temp

(

ProductID int,

AttChangeCost money,

AttTime datetime

)

To create the update trigger on the ProductCostHistory, John needs to execute the

following statements:

CREATE TRIGGER updTrigger ON [Production].[ProductCostHistory]

INSTEAD OF UPDATE

AS

BEGIN

DECLARE @PID AS int

DECLARE @COST AS money

SELECT @pid = ProductID, @cost = StandardCost FROM Deleted

INSERT INTO Temp VALUES(@pid, @cost, getdate())

SELECT 'Sorry you can not change the price of a Product'

END

Solutions to Exercises

Chapter 8

Tip

To verify the update trigger on the ProductCostHistory, John needs to execute the following statements:

UPDATE [Production].[ProductCostHistory]

SET StandardCost = 55

WHERE ProductID = 707

Database engine will display the following message:

‘Sorry you can not change the price of a Product’

Exercise 2

The management of AdventureWorks, Inc wants that whenever the pay rate of an employee is modified, its effect on the monthly salary of the employee should be

displayed John, a database developer at AdventureWorks, has been asked to resolve this problem Help John to find out appropriate solution

Monthly Salary = Rate * PayFrequency * 30

Solution

To accomplish this task, John needs to create an update trigger on the

HumanResources.EmployeePayHistory To create the trigger, he needs to execute the following statements:

CREATE TRIGGER updTrigger ON HumanResources.EmployeePayHistory FOR UPDATE

AS

BEGIN

DECLARE @rate AS money

DECLARE @frq AS int

SELECT @rate = Rate, @frq = PayFrequency FROM Inserted

SELECT @rate * @frq * 30 AS 'Monthly Salary'

END

¤NIIT Instructor Inputs 15.5

Note

To verify the trigger, John needs to execute the following statement to update the salary

for employee with EmployeeID as 160:

UPDATE HumanResources.EmployeePayHistory

SET Rate = Rate + 5

WHERE EmployeeID = 160

The output will show the monthly salary after the change is done

Exercise 1

The AdventureWorks database maintains the sales details in the SalesOrderHeader and

SalesOrderDetails tables As a database developer of AdventureWorks, Inc., you need to

retrieve all the order numbers for the sales accounts in the following format:

AccountNumber OrderNumbers

10-4020-000676 SO43659 SO44305 SO45061 SO45779

10-4020-000117 SO43660 SO47660 SO49857 SO51086

How will you retrieve data in the given format?

To complete this exercise, you need to provide the AccontDetails.dll file to the students

The file is available in the Datafiles_for_students\QMDS2005\Chapter 09 folder in the

TIRM CD

Solution

To solve the preceding problem, you need to perform the following tasks:

1 Create the assembly

2 Create the function

3 Verify the result

Chapter 9

Task 1: Creating the Assembly

To create the assembly, you need to perform the following steps:

1 Open the Microsoft SQL Server Management Studio window

2 In the Query Editor window, enter the following statement:

CREATE ASSEMBLY AccDetails FROM ‘C:\AccountDetails.dll’ WITH

PERMISSION_SET = UNSAFE

The AccountDetails.dll file is created by using the following code:

using System;

using System.Data;

using System.Data.Sql;

using Microsoft.SqlServer.Server;

using System.Collections;

using System.Data.SqlTypes;

using System.Data.SqlClient;

using System.Diagnostics;

using System.IO;

namespace AccountDetails

{

public class Det

{

[Microsoft.SqlServer.Server.SqlFunction(DataAccess =

DataAccessKind.Read, SystemDataAccess = SystemDataAccessKind.Read)] public static SqlString details(SqlString acn)

{

SqlConnection connection = new SqlConnection("context connection = true");

SqlString sr = new SqlString();

connection.Open();

SqlCommand cmd = new SqlCommand("select salesorderid from sales.salesorderheader where accountnumber =

'"+acn.ToString()+"'", connection);

SqlDataReader dr;

dr = cmd.ExecuteReader();

while (dr.Read())

{

sr = sr.ToString() + " " + dr[0].ToString(); }

¤NIIT Instructor Inputs 15.7

Note

connection.Close();

return sr;

}

}

}

3 Press the F5 key to execute the statement

Task 2: Creating the Function

To create the function for the required scenario, you need to perform the following steps:

1 Type the following statement in the Query Editor window:

CREATE FUNCTION AccDetails (@acn nvarchar(20)) RETURNS nvarchar(200)

AS EXTERNAL NAME [AccDetails].[AccountDetails.Det].details

2 Press the F5 key to execute the statement

Task 3: Verifying the Result

To verify the result of the function, execute the following statement:

SELECT dbo.AccDetails(‘10-4020-000676’) AS Details

Exercise 1

Multiple business partners of AdventureWorks need to use the details of all the sales

stores stored in the AdventureWorks database server The details include the name of the

store, name of the store owner, and e-mail address of the owner As per the company’s

security policy, access to company’s databases cannot be provided to any external entity

As a database developer, how will you make the list available to the other organizations

without any additional overhead?

If you are unable to view the Web service in the Object Explorer, you need to refresh

the Object Explorer window several times

Chapter 10

Solution

To provide the required functionality to other organizations, you need to perform the following tasks:

1 Create a stored procedure

2 Create an HTTP endpoint

3 Verify the creation of HTTP endpoint

Task 1: Creating a Stored Procedure

To make the data available to the clients, you need to create a database object that will provide the data This database object will be converted into web method and will be hosted in a web service In current scenario, we need to create a stored procedure that will provide the data from the related tables

To create the stored procedure, you need to perform the following steps:

1 Type the following statement in the Query Editor window of the Microsoft SQL

Server Management Studio window:

CREATE PROCEDURE HTTPProc

AS

BEGIN

SELECT tbl1.NAME, tbl2.FirstName, tbl2.EmailAddress

FROM Sales.Store AS tbl1 JOIN Sales.StoreContact AS tbl3

ON tbl1.CustomerID = tbl3.CustomerID JOIN Person.Contact AS tbl2

ON tbl3.ContactID = tbl2.ContactID

END

2 Press the F5 key to execute the statement

Task 2: Creating an HTTP Endpoint

Once you have created the database object to provide the data, you can create the access mechanism to provide the data (HTTP endpoint) To create a new HTTP endpoint, you need to perform the following steps:

3 Type the following statement to create an HTTP endpoint named DetailsStore:

CREATE ENDPOINT DetailsStore

STATE = STARTED AS HTTP(

PATH = '/stores',

AUTHENTICATION = (INTEGRATED ),

¤NIIT Instructor Inputs 15.9

Note

WEBMETHOD 'StoreDetail' (name='AdventureWorks.dbo.HTTPProc',

SCHEMA=STANDARD ),

WSDL = DEFAULT, SCHEMA = STANDARD, DATABASE = 'AdventureWorks',

NAMESPACE = 'http://tempUri.org/' );

4 Press the F5 key to execute the statement

Task 3: Verifying the Creation of HTTP Endpoint

To verify the creation of HTTP endpoint, you can view the details of the Web method in

the Microsoft SQL Sever Management Studio window For this, you need to expand

the Server ObjectsÆEndpointsÆSOAP nodes in the Object Explorer window You

will view the HTTPProc Web method listed under the SOAP node

If you are unable to view the web service in the Object Explorer, you need to refresh it

several times