Tài liệu Module 7: Case Study—Creating the Store Expense Cube pdf

Contents Overview 1 Lab A: Building the Store Expense Cube 7 Updating the Store Expense Cube 12 Lab B: Modifying the Store Expense Cube 13 Review 20 Module 7: Case Study—Creating th

Contents

Overview 1

Lab A: Building the Store Expense Cube 7

Updating the Store Expense Cube 12

Lab B: Modifying the Store Expense Cube 13

Review 20

Module 7: Case Study—Creating the Store Expense Cube

BETA MATERIALS FOR MICROSOFT CERTIFIED TRAINER PREPARATION PURPOSES ONLY

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Module 7: Case Study—Creating the Store Expense Cube iii

Instructor Notes

In this module, students apply concepts they have learned in modules 1 through

6 in course 2074A, Designing and Implementing OLAP Solutions Using

Microsoft SQL Server 2000 Students will use various cube and dimension

techniques to build an online analytical processing (OLAP) cube for store expenses by using Microsoft® SQL Server™ 2000 Analysis Services In the labs, students are given high-level procedures and must recall the specific steps and actions for creating various dimension and cube structures Students create

a preliminary cube, and then must make changes to the cube by applying dimension and level properties

After completing this module, students will be able to:

! Create a cube based on user requirements

! Update dimensions and add new dimensions to a cube

Materials and Preparation

This section provides the required materials and preparation tasks that are needed to teach this module

Required Materials

To teach this module, you need the following materials:

! Microsoft PowerPoint® file 2074A_07.ppt

Preparation Tasks

To prepare for this module, you should:

! Read all of the student materials

! Read the instructor notes and margin notes

! Complete all of the demonstrations

! Practice the lecture presentation and demonstrations

! Complete the labs

! Review the Trainer Preparation presentation for this module on the Trainer Materials compact disc

! Review any relevant white papers that are located on the Trainer Materials compact disc

Presentation:

30 Minutes

Labs:

60 Minutes

iv Module 7: Case Study—Creating the Store Expense Cube

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Demonstration: Reviewing Lab A

In this demonstration, you will view and discuss the solutions of lab A

The following demonstration procedures provide information that will not fit in the margin notes or are not appropriate for student notes

! To restore a new database and define a data source

1 In Analysis Manager, right-click the server, click Restore Database, click the Look in list, find and click the file

C:\Moc\2074A\Labfiles\L07\Answers\Module 07A.CAB, click Open, and then click Restore

2 Expand the Module 07A database, double-click the Data Sources folder, right-click the Module 07 data source, and then click Edit

3 Verify that localhost is selected in step 1 and that Module 07 is selected in step 3 Click OK

! To view the Store Expense cube

1 Expand the Cubes folder, right-click Store Expense, and then click Edit

2 Point out that the cube contains the dimensions shown in the following table

4 Highlight the fact that the cube contains one measure—Amount

5 Drill down on each dimension and verify that students have the correct number of levels in each dimension and that the levels are in the correct order

6 Drill down on the Account dimension and verify that students have the

correct members in the correct order

7 Save the Store Expense cube and close the Cube Editor

Demonstration:

10 Minutes

Module 7: Case Study—Creating the Store Expense Cube v

Demonstration: Reviewing Lab B

In this demonstration, you will view and discuss the solutions of lab B

The following demonstration procedures provide information that will not fit in the margin notes or are not appropriate for student notes

! To restore a new database and define a data source

1 In Analysis Manager, right-click the server, click Restore Database, click the Look in list, find and click the file

C:\Moc\2074A\Labfiles\L07\Answers\Module 07B.CAB, click Open, and then click Restore

2 Expand the Module 07B database, double-click the Data Sources folder, right-click the Module 07 data source, and then click Edit

3 Verify that localhost is selected in step 1 and that Module 07 is selected in step 3 Click OK

! To view the Store Expense cube

1 Expand the Cubes folder, right-click Store Expense, and then click Edit

2 Point out that the cube contains the dimensions shown in the following table

3 Browse the cube, and notice the Scenario dimension

The Scenario dimension does not contain the All Scenario member

4 Notice the Time dimension It does not contain the All Time member

5 Pivot the Store dimension to the row area in the browser

6 Double-click the Store Country level heading, double-click the Store State level heading, and notice that the Mexico state is hidden

7 Drill down to the Store Name level and notice the names of the stores

They contain both the city name and the store name

8 Browse the Store Manager dimension, and notice the First Letter level

that groups the store managers by the first letter of their names

9 In the Store Manager dimension, notice that no null member names exist at the First Letter level All null member names are hidden

Demonstration:

10 Minutes

vi Module 7: Case Study—Creating the Store Expense Cube

BETA MATERIALS FOR MICROSOFT CERTIFIED TRAINER PREPARATION PURPOSES ONLY

! To view Store Type and Account

1 In the Cube Editor, browse the Store Type dimension and verify that it contains seven members, including the All Store Type member

2 Pivot the Account dimension to the row area, expand the dimension to all levels, right-click the members, and click Member Properties to view the

unary operators for each member

3 Point out that the Account dimension does not contain the All Account

Module 7: Case Study—Creating the Store Expense Cube vii

Other Activities

Difficult Questions

Below are difficult questions that students may ask you during the delivery of this module and answers to the questions These materials delve into subjects that are within the scope of the module but are not specifically addressed in the content of the student notes

1 Where in Analysis Manager do you make changes to existing dimensions?

Where you update existing dimensions depends on the type of dimension that requires modification You modify shared dimensions in the Dimension Editor You modify private dimensions in the Cube Editor

2 Why do you want a dimension to be balanced in structure?

When a dimension is balanced, you take advantage of precalculations for cube aggregations Therefore, user queries execute faster than if the queries were made against dimensions without precalculated

aggregations

Balanced dimensions contain the same number of levels in each dimension branch You create a balanced dimension by defining a standard dimension (not a parent-child dimension) when you create it

in the Dimension Wizard or the Dimension Editor

Unbalanced dimensions must be defined as parent-child dimensions, and do not have the same number of levels in each dimension branch Parent-child dimensions provide flexibility in dimension structure, allowing for complex hierarchies such as charts of accounts and organizational structures However, query performance can be slower when you use parent-child dimensions than when you use standard dimensions, because aggregates are not stored for parent-child dimensions

3 In lab B, why do students process the Store dimension after updating the Member Name Column of the Store Name level?

Students process and rebuild the Store dimension after the update of the Member Name Column because change to the dimension structure affects the processing of the cube Without the rebuild, cube processing fails in the Store Expense cube The dimension does not force a rebuild

at cube processing time, which is why students rebuild the dimension in the Dimension Editor

If Store were a private dimension, the dimension processes automatically at cube processing time However, because Store is a shared dimension, the students must explicitly process the dimension themselves

The students do not process the other shared dimensions, Scenario and Account Analysis Manager detects the changes made to the Scenario and Account structures, and the dimensions process automatically when the cube is processed

viii Module 7: Case Study—Creating the Store Expense Cube

BETA MATERIALS FOR MICROSOFT CERTIFIED TRAINER PREPARATION PURPOSES ONLY

4 When creating a level from an expression, why must both the Member Key Column and the Member Name Column include the expression?

The Member Key Column includes the expression because it builds the level and the members in the level based upon the expression

The Member Name Column includes the expression because it names each of the members based on the expression

Module 7: Case Study—Creating the Store Expense Cube ix

Module Strategy

Use the following strategy to present this module:

! Building the Store Expense Cube Introduce the Store Expense data source schema Briefly describe the

dimensions and levels that are created in lab A Describe the use of the one

measure, Amount, in the Store Expense cube After students complete lab

A, open the archived OLAP database and explain the Store Expense cube

! Updating the Store Expense Cube Explain to students that they will modify the Store Expense cube in lab B

After students complete lab B, open the archived OLAP database and

explain the Store Expense cube

Module 7: Case Study—Creating the Store Expense Cube 1

Overview

! Building the Store Expense Cube

! Updating the Store Expense Cube

In this module, you will apply what you learned about the topics covered in

modules 1 through 6 in course 2074A, Designing and Implementing OLAP

Solutions with Microsoft SQL Server 2000, by creating an online analytical

processing (OLAP) cube and several dimensions from start to finish

After completing this module, you will be able to:

! Create a cube based on user requirements

! Update dimensions and add new dimensions to a cube

In this module, you will

apply what you learned

about the topics covered in

modules 1 through 6 of

course 2074A, Designing

and Implementing OLAP

Solutions Using Microsoft

SQL Server 2000 by

creating a cube and several

dimensions from start to

finish

2 Module 7: Case Study—Creating the Store Expense Cube

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# Building the Store Expense Cube

! Defining the Store Expense Schema

! Introducing the Dimensions and Levels

! Analyzing the Measures

You will build the Store Expense cube to analyze expenses for stores The

expenses exist for all stores in each of the store geographies You will track expenses by store managers to determine the amount that each manager spends

In addition, you will determine expenses by store departments

Expenses are stored in two years: 2000 and 2001 For now, all the data that

exists in the database corresponds to current year actual expenses However, in

the future, the Store Expense cube will be used to create the expense budget Therefore, budget and forecast members exist in the Scenario dimension to

store the budgets

In the future, Net Sales values will be used to calculate Net Income from Total Expenses However, the current database does not contain Net Sales values Therefore, the Net Income values will be negative

In this section, you will learn about the schema of the database used to create

the Store Expense cube by using Microsoft® SQL Server™ 2000 Analysis Services In addition, you will learn about the dimensions and measures that

you will create in the Store Expense cube

Topic Objective

To introduce the first section

of the module, which

introduces the database,

dimensions, and levels in

the Store Expense cube

Lead-in

In this section, you will learn

about the database that you

use to build the Store

Expense cube In addition,

you will learn about the

dimensions and measures

of the cube

Discuss the business

reason for implementing the

Store Expense cube

Module 7: Case Study—Creating the Store Expense Cube 3

Defining the Store Expense Schema

The Module 07 SQL Server 2000 database contains tables that you will use to create the Store Expense cube

You will use the following tables to build the cube:

To introduce the Store

Expense schema that

students use to build the

Store Expense cube

Lead-in

You will be creating the

Store Expense cube by

using the tables in the

Module 07 SQL Server

2000 database

Delivery Tip

Deliver this page either by

using the slide directly or by

opening the diagram Store

Expense Schema in SQL

Server Enterprise Manager

4 Module 7: Case Study—Creating the Store Expense Cube

BETA MATERIALS FOR MICROSOFT CERTIFIED TRAINER PREPARATION PURPOSES ONLY

Introducing the Dimensions and Levels

You will create six dimensions in the Store Expense cube Before creating

each dimension, you will determine the source table and the levels that are required to build the dimension

Scenario

Define the shared Scenario dimension by using the scenario table The Scenario dimension contains four members in one level The member names

are:

! Adjustment for Budget input

! Current Year’s Actuals

! Current Year’s Budget

! Forecast

Time

Define the private Time dimension by using the expense_fact table The Time

dimension contains three levels:

! Year

! Quarter

! Month Verify that the Time dimension levels are specified with the proper Level Type

properties

Topic Objective

To introduce the dimensions

and levels created in the

Store Expense cube

Lead-in

You will create six

dimensions in the Store

Expense cube

Delivery Tips

For classes with more

experienced students,

briefly highlight the fact that

they will be creating several

dimensions in lab A Do not

cover the dimension

structures in detail

For less advanced classes,

use this page as an

opportunity to prepare

students for the lab by

discussing each of the

dimensions in detail

Module 7: Case Study—Creating the Store Expense Cube 5

Store

Define the shared Store dimension by using the store table The Store

dimension contains four levels:

Define the shared Account dimension by using the account table The Account

dimension contains levels defined by the parent-child structure found in the