Tài liệu Module 18: Case Study Working with the Foodmart Database ppt

Students will use various cube and dimension techniques to build cubes from the Foodmart 2000 database by using Microsoft SQL Server 2000 Analysis Services.. Building the Warehouse and

Contents

Overview 1

Lab A: Building the Warehouse Cube 8

Lab B: Building the Sales Cube 22

Building the Warehouse and Sales Virtual

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Instructor Notes

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

17 in the course 2074A, Designing and Implementing OLAP Solutions Using

Microsoft® SQL Server™ 2000 Students will use various cube and dimension

techniques to build cubes from the Foodmart 2000 database 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 must then 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

! Create another cube with different dimensions and measures

! Build a virtual cube

Materials and Preparation

This section lists the required materials and preparation tasks that you need to teach this module

Required Materials

To teach this module, you need the following materials:

! Microsoft PowerPoint® file 2074A_18.ppt

Preparation Tasks

To prepare for this module, you should:

! Perform all the student labs

! Read all the student materials

! Read the instructor notes and margin notes

! Practice integrating the demonstrations with the lecture

! 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

Presentation:

60 Minutes

Labs:

120 Minutes

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 is 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, click the file

C:\Moc\2074A\Labfiles\L18\Answers\Module 18A.CAB, click Open,

click the Restore button, and then click Close

2 Expand the Module 18A database, double-click the Data Sources folder, right-click the FoodMart 2000 data source, and then click Edit

3 Verify that FoodMart 2000 is selected in step 1 Click OK

! To view the Warehouse cube

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

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

3 Highlight the fact that the cube contains the following measures:

• Units Ordered

• Units Shipped

• Warehouse Sales

• Warehouse Cost

• Maximum Supply Time

4 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

5 Drill down on the First Opened Year dimension and verify that students have the correct expression in the Member Key Column and the Member

Name Column for the level

6 Click the Maximum Supply Time measure, and verify that students use the

Max Aggregate Function to define the measure

7 Edit each of the three calculated members, and verify that students use the correct expressions to define each calculated member

8 Close the Cube Editor

9 Expand the Warehouse cube, expand the Partitions folder, and verify that students have two partitions defined in the cube: one partition for 1998 inventory data and one for 1997 inventory data

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 is 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, click the file

C:\Moc\2074A\Labfiles\L18\Answers\Module 18B.CAB, click Open,

click the Restore button, and then click Close

2 Expand the Module 18B database, double-click the Data Sources folder, right-click the FoodMart 2000 data source, and then click Edit

3 Verify that FoodMart 2000 is selected in step 1 Click OK

! To view the Sales cube

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

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

3 Highlight the fact that the cube contains the following measures:

• Store Sales

• Store Cost

• Unit Sales

4 Notice the Customer dimension

The Customer dimension contains the Customer level that uses the

customer_id as the Member Key Column, and lname, fname as the

Member Name Column

Demonstration:

10 Minutes

5 Notice the Product dimension The Product Name level is disabled in the

Cube Editor

6 Edit each of the three calculated members, and verify that students use the correct expressions to define each calculated member

7 Close the Cube Editor

8 Expand the Sales cube, expand the Partitions folder, and verify that students have three partitions defined in the cube: one partition for 1997 sales data, one for 1998 sales data, and one for 1998 December sales data

Demonstration: Reviewing Lab C

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

The following demonstration procedures provide information that will not fit in the margin notes or is 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, click the file

C:\Moc\2074A\Labfiles\L18\Answers\Module 18C.CAB, click Open,

click the Restore button, and then click Close

2 Expand the Module 18C database, double-click the Data Sources folder, right-click the FoodMart 2000 data source, and then click Edit

3 Verify that FoodMart 2000 is selected in step 1 Click OK

! To view the Warehouse and Sales virtual cube

1 Expand the Cubes folder, right-click Warehouse and Sales, and then click

4 Edit the Average Shipped Cost calculated member, and verify that students

use the correct expression to define the calculated member

5 Verify that Average Selling Price does not exist in the cube

6 Close the Virtual Cube Editor

Demonstration:

10 Minutes

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 How can you temporarily add 1997 inventory data to the Warehouse cube?

You can incrementally update the Warehouse cube, defining the inventory_fact_1997 as the fact table from which to retrieve data

2 What is an easy way to create the First Opened Year dimension in the

Warehouse cube?

In the Warehouse Cube Editor, create a new dimension by using the Dimension Wizard Select the store table as the dimension table, create the dimension as a Time dimension, and then define the hierarchy containing two levels—year and month At the end of the wizard, clear the Share this dimension with other cubes check box

After the dimension appears in the cube tree view, you can delete the month level, leaving one level, First Opened Date Rename the level First Opened Year

Module Strategy

Use the following strategy to present this module:

! Building the Warehouse Cube Begin by defining the schema that students will use to build the Warehouse

cube Let students know which tables to use, and then introduce the dimensions and levels that they will create Next, introduce the measures to include in the cube Finally, define the calculated members to create

! Building the Sales Cube Introduce the schema of the Sales cube Let students know which tables to

use Next, introduce the dimensions and levels that they will create and then introduce the measures to include Finally, define the calculated members to create

! Building the Warehouse and Sales Virtual Cube Explain that students will be creating a virtual cube named Warehouse and

Sales by combining the Warehouse cube and the Sales cube Introduce the

dimensions and levels to be included, and then define which measures to add Finally, explain that students will add calculated members by using two different methods—creating a new one, and importing several from the source cubes

Overview

! Building the Warehouse Cube

! Building the Sales Cube

! Building the Warehouse and Sales Virtual Cube

In this module, you will apply the concepts learned in modules 1 through 17 in

the course 2074A, Designing and Implementing OLAP Solutions Using

Microsoft® SQL Server™ 2000 by creating various cubes from the Foodmart

2000 database

After completing this module, you will be able to:

! Create a cube based on user requirements

! Create another cube with different dimensions and measures

! Build a virtual cube

In this module, you will

apply the concepts learned

in modules 1 through 17 of

the course 2074A,

Designing and Implementing

OLAP Solutions Using

Microsoft SQL Server 2000

by creating various cubes

from the Foodmart 2000

database

# Building the Warehouse Cube

! Defining the Warehouse Schema

! Introducing the Dimensions and Levels

! Analyzing the Measures

! Defining the Calculated Members

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

the Warehouse cube by using Microsoft SQL Server 2000 Analysis Services

In addition, you will learn about the dimensions, measures, and calculated

members that you will create in the Warehouse cube

Topic Objective

To introduce the database,

dimensions, and levels in

the Warehouse cube

Lead-in

In this section, you will learn

about the database that you

use to build the Warehouse

cube In addition, you will

learn about the dimensions

and measures of the cube

Defining the Warehouse Schema

The Foodmart 2000 database contains tables that you will use to create the

Warehouse cube

You will create a cube that tracks Units Ordered, Units Shipped, Warehouse

Sales, Warehouse Cost, Maximum Supply Time, and Margin Users need to

see these numeric values by Warehouse, by Store, by Time period, and by

Product You will need to include two years worth of data, as well as the

variance of the two years—1997 and 1998 In addition, users want to evaluate

the all the values based on the year in which the stores opened

The tables that you will use to build the cube are the following:

! Inventory fact tables—for 1997 and 1998 data

Warehouse schema that

students use to build the

Warehouse cube

Lead-in

You will be creating the

Warehouse cube by using

the tables in the Foodmart

2000 Microsoft Access 2000

database

Delivery Tips

Let students know that they

can turn back to this page

during the lab to identify

levels and tables used to

Introducing the Dimensions and Levels

! Product

! Time

! Warehouse

! Store

! First Opened Year

You will create five dimensions in the Warehouse cube Before creating each

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

to build the dimension

Product

Define the shared Product dimension by using the tables product and

product_class The Product dimension contains six levels:

Define the shared Time dimension by using the time_by_day table The Time

dimension contains three levels:

To introduce the dimensions

and levels created in the

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

Warehouse

Define the shared Warehouse dimension by using the tables warehouse and

warehouse_class The Warehouse dimension contains four levels:

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

dimension contains four levels:

! Store Country

! Store State

! Store City

! Store Name

First Opened Year

Define the private First Opened Year dimension by using the store table This

defines the year in which each store first opened

Use an expression to generate the year for this dimension by using the datepart

function

Analyzing the Measures

! Units Ordered

! Units Shipped

! Warehouse Sales

! Warehouse Cost

! Maximum Supply Time

You will create five measures in the Warehouse cube All measures come from

the inventory fact tables The measures to include in the cube are:

Defining the Calculated Members

$ Rollup created by using the Sum function

You will create three calculated members in the Warehouse cube The

calculated members to include in the cube are:

! Margin Warehouse Sales - Warehouse Cost

! 1998 versus 1997 Variance The difference between the two years

! USA + Canada The rollup of the two members created by using the Sum

function

Topic Objective

To describe the use of

calculated members in the

Warehouse cube

Lead-in

You will create three

calculated members in the

Warehouse cube

Lab A: Building the Warehouse Cube

Objectives

After completing this lab, you will be able to:

! Create a new cube from start to finish

! Create several dimensions in a cube

! Verify results of a cube

Prerequisites

Before working on this lab, you must have:

! Experience working with dimensions

! An understanding of dimensions, cubes, and measures

! Experience working with the Cube Editor and the Dimension Editor

! Experience working with the Calculated Member Builder

For More Information

This module uses the Analysis Manager to create a new cube with several dimensions For more information, note the following references

The Dimension Editor

For more information on using the Dimension Editor interface and creating dimensions, see module 4, "Building Dimensions Using the Dimension Editor," and module 5, “Using Advanced Dimension Settings,” in course 2074A,

Designing and Implementing OLAP Solutions Using Microsoft SQL Server

2000

Topic Objective

To introduce the lab

Lead-in

In this lab, you will create a

new cube, Warehouse,

from start to finish

Explain the lab objectives

The Cube Editor

For more information on using the Cube Editor, see module 6, "Working with

Cubes and Measures," in course 2074A, Designing and Implementing OLAP

Solutions Using Microsoft SQL Server 2000

Calculated Members

For more information on creating calculated members, see module 11,

"Implementing Calculations Using MDX," in course 2074A, Designing and

Implementing OLAP Solutions Using Microsoft SQL Server 2000

Partitions

For more information on creating partitions, see module 10, "Managing

Partitions," in course 2074A, Designing and Implementing OLAP Solutions

Using Microsoft SQL Server 2000

Estimated time to complete this lab: 60 minutes

Exercise 1

Creating the Warehouse Cube

In this exercise, you will create a new cube, Warehouse, which contains five

dimensions with varying specifications, levels, and structures In addition, the cube contains five measures and three calculated members You will process the cube and will confirm that the cube is correct by verifying cube values The lab provides high-level procedures for you to follow If you do not remember the specific steps for a procedure, refer to the modules outlined in the

For Your Information section of the lab

If you still cannot determine the proper steps for a single procedure, then refer

to the corresponding answer files, which are located in:

C:\Moc\2074A\Labfiles\L18\Answers

! To create a new database

1 In Analysis Manager, create a new database, and then name the database

Module 18

2 Create a new data source in Module 18

3 On the Provider tab of the Data Link Properties dialog box, click the

Microsoft OLE DB Provider for ODBC Drivers Click Next

4 On the Connection tab, click the Use data source name list, and then click

Foodmart 2000

5 Click Test Connection to verify that the Foodmart 2000 data source is

available to the local server

6 Click OK, and close the Data Link Properties dialog box

! To create a new cube

1 In the Module 18 OLAP database, create a new cube containing the

following five measures defining 1998 inventory data:

• Units Ordered

• Units Shipped

• Warehouse Sales

• Warehouse Cost

• Maximum Supply Time

2 Create and add the following five dimensions to the Warehouse cube:

To determine the tables and columns to include in the dimensions, browse the dimension tables either in Analysis Manager or in the database schema presented earlier in the module

Use the following table to create the dimensions with various dimension specifications

Dimension Name Dimension Type Levels/Members

Family, Product Department, Product Category, Product Subcategory, Brand Name, Product Name

Quarter, Month

Description, State, Warehouse

Country, Store State, Store City, Store Name First Opened Year Private One level: First Opened

Year, derived by using the

datepart time function

3 Name the cube Warehouse

4 Process the cube, without defining aggregations or storage mode

Tip

1 In the cube browser, verify that you retrieve $261.15 for the following member combination:

3 Why do you not receive any data for 1997?

You were told to define the measures for 1998 inventory data

Therefore, you defined the fact table as inventory_fact_1998

Exercise 2

Updating the Warehouse Cube

In this exercise, you will modify the Warehouse cube by adding calculated members and retrieving data from another fact table containing 1997 data

! To add 1997 data to Warehouse

• In the Warehouse cube, update the cube to permanently include inventory data for 1997

! To create calculated members

• In the Warehouse cube, create the following three calculated members:

• Margin Warehouse Sales - Warehouse Cost

• 1998 versus 1997 Variance

The difference between 1998 and 1997

• USA + Canada Stores

A rollup created by using the Sum function

To define a multidimensional expressions (MDX) set with only two

members, the syntax is the following: {member1, member2} Notice the

braces surrounding the two members and the comma separating the two members

! To verify cube results

1 In the cube browser, verify that you retrieve 96 for the following member combination:

Demonstration: Reviewing Lab A

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

Topic Objective

To demonstrate solutions to

lab A

Lead-in

In this demonstration, you

will view and discuss the

solutions to lab A

Delivery Tips

The steps for this

demonstration are included

in the Instructor Notes

Encourage students to

follow along with the

demonstration by comparing

their Warehouse cube to

the archived version that

you demonstrate