Tài liệu Delivery Guide pptx

Course Number: 1609A

Developed with KiZAN Corporation



1099 Part Number: x04-99424
Delivery Guide
Designing Data Services and
Data Models


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Project Lead: Janet Robinson, Mark Bader
Instructional Designers: Mark Bader, Shawn Lock, Michas Sadzak
Program Managers: Mark Bader, Rama Biswas, Teresa Canady
Subject Matter Experts: Mark Bader, Whitney Roberts (KiZAN Corporation), Janet Robinson,
Scott F. Wilson (KiZAN Corporation)
Graphic Artist: Elizabeth Johanson (ArtSource, Inc.)
Editors: Joyce Cox (Online Training Solutions, Inc.), Todd Duft (Write Stuff), Elizabeth Hui
Reese (Write Stuff)
Testers: Chris Baca (Digital Counterbalance), Rick Carr (Digital Counterbalance)
Production Support: Linda Lu Cannon (Write Stuff), Marlene Lambert (Online Training
Solutions, Inc.), Eric Wagoner (Write Stuff)
Manufacturing Support: Julie Challenger, John Williams
Product Manager: Ron Wodaski
Business Manager: Roger Gerdes
Authors: Mark Bader, Whitney Roberts (KiZAN Corporation), Janet Robinson, Scott F. Wilson
(KiZAN Corporation)

Course Number: 1609A
Part Number: X04-99424

October 1999
Contents iii


Contents
Introduction
Introductions ........................................................................................................... 3
Course Materials ..................................................................................................... 4
Prerequisites............................................................................................................ 5
Microsoft Certified Professional Program .............................................................. 6
Facilities.................................................................................................................. 7
Module 1: Course Overview
Overview............................................................................................................... 11
Business Solutions Design Curriculum................................................................. 12
Curriculum Vision and Purpose....................................................................... 13
Courses in the Curriculum ............................................................................... 14
Curriculum Case Study.................................................................................... 15
Overview of This Course ...................................................................................... 16
Course Vision and Purpose.............................................................................. 17
Course Objectives ............................................................................................ 18
Modules in This Course................................................................................... 19
Activity 1.1: Categorizing Existing Information................................................... 21
Module 2: Solution Design Processes
Overview............................................................................................................... 25
Design Processes................................................................................................... 26
The MSF Process Model.................................................................................. 27
Requirements Gathering .................................................................................. 29
The MSF Design Process Model ..................................................................... 30
Data and the MSF Design Process Model ....................................................... 32
Benefits of the Design Process......................................................................... 33

Services-Based Design.......................................................................................... 34
The MSF Application Model ........................................................................... 35
Logical Network of Cooperating Services....................................................... 36
Data Services ................................................................................................... 37
Examples of Services....................................................................................... 38
Benefits of Services-Based Design .................................................................. 39
Activity 2.1: Identifying Services .................................................................... 40
Review .................................................................................................................. 41
Guidelines ........................................................................................................ 42
Review Questions ............................................................................................ 43
Looking Forward ............................................................................................. 44
Module 3: Using a Conceptual Design for Data Requirements
Overview............................................................................................................... 47
Investigation Process............................................................................................. 48
Gathering Information ..................................................................................... 49
Analyzing Information..................................................................................... 50
Creating Use Cases .......................................................................................... 51
Data Requirements................................................................................................ 52
Characteristics of Data Requirements.............................................................. 53
Categories of Data Requirements .................................................................... 54
Identifying Functional Data Requirements ...................................................... 56
iv Contents


Identifying Nonfunctional Data Requirements ................................................ 57
Activity 3.1: Identifying Data-Related Use Cases and Data Requirements..... 58
Validating Data Requirements ......................................................................... 59
Activity 3.2: Relating Data Requirements to Conceptual Design......................... 60
Review .................................................................................................................. 61
Guidelines ........................................................................................................ 62

Review Questions ............................................................................................ 63
Looking Forward ............................................................................................. 64
Module 4: Deriving a Logical Data Design
Overview............................................................................................................... 67
Logical Data Design.............................................................................................. 68
The Need for a Logical Data Design ............................................................... 69
Deriving Logical Data Services ....................................................................... 70
Entities and Attributes........................................................................................... 72
Overview of Entities and Attributes................................................................. 73
Deriving Entities .............................................................................................. 74
Deriving Attributes .......................................................................................... 75
Activity 4.1: Deriving Entities and Attributes from Data Requirements......... 76
Data Relationships ................................................................................................ 77
Overview of Data Relationships ...................................................................... 78
Identifying Relationships Between Entities..................................................... 79
Overview of Cardinality and Existence ........................................................... 80
Determining Cardinality .................................................................................. 81
Determining Existence..................................................................................... 82
Entity/Relationship Modeling ............................................................................... 83
Syntax .............................................................................................................. 84
Creating the Logical Data Model..................................................................... 86
Activity 4.2: Creating a Logical Data Model................................................... 88
Review .................................................................................................................. 89
Guidelines ........................................................................................................ 90
Review Questions ............................................................................................ 91
Looking Forward ............................................................................................. 92
Module 5: Normalizing the Logical Data Design
Overview............................................................................................................... 95
Implementing Entity Relationships....................................................................... 96
Using Keys....................................................................................................... 97

Primary Keys ................................................................................................... 98
Foreign Keys.................................................................................................... 99
Examples of Primary and Foreign Keys ........................................................ 100
Activity 5.1: Identifying Keys in the Logical Model..................................... 101
Normalization Basics .......................................................................................... 102
Normalizing Logical Models ......................................................................... 103
Creating a First Normal Form Data Model .................................................... 105
First Normal Form Example .......................................................................... 106
Moving to a Second Normal Form Data Model............................................. 107
Creating a Third Normal Form Data Model .................................................. 108
Third Normal Form Example......................................................................... 109
Benefits of Normalization.............................................................................. 110
Contents v



Activity 5.2: Normalizing Data...................................................................... 111
Review ................................................................................................................ 112
Guidelines ...................................................................................................... 113
Review Questions .......................................................................................... 114
Looking Forward ........................................................................................... 115
Module 6: Deriving a Physical Data Design
Overview............................................................................................................. 119
Physical Data Design .......................................................................................... 120
Describing a Physical Data Model................................................................. 121
Identifying Database Tables and Fields ......................................................... 123
Common Data Types ..................................................................................... 124
Implementing Relationships................................................................................ 125
Implementing One-to-One Relationships ...................................................... 126
Implementing One-To-Many Relationships .................................................. 127

Implementing Many-To-Many Relationships................................................ 128
Activity 6.1: Translating the Logical Data Design ........................................ 129
Data Optimization Techniques............................................................................ 130
Goals of Optimization.................................................................................... 131
Optimizing for Creation of Data .................................................................... 133
Optimizing for Retrieval of Data ................................................................... 134
Optimizing for Updating Data ....................................................................... 136
Considerations for Deleting Data................................................................... 138
Activity 6.2: Optimizing a Physical Data Design .......................................... 139
Review ................................................................................................................ 140
Guidelines ...................................................................................................... 141
Review Questions .......................................................................................... 142
Looking Forward ........................................................................................... 143
Module 7: Implementing Data Integrity
Overview............................................................................................................. 147
Overview of Data Integrity ................................................................................. 148
Data Integrity Categories ............................................................................... 149
Referential Integrity ....................................................................................... 150
Data Validation.............................................................................................. 151
Identifying Data Integrity Requirements ....................................................... 153
Activity 7.1: Identifying Data Integrity Requirements .................................. 154
Implementing Data Integrity Requirements........................................................ 155
Identifying Business Rules ............................................................................ 156
Deploying Business Rules and Data Integrity Requirements ........................ 157
Implementing in the Database........................................................................ 158
Implementing Programmatically.................................................................... 160
Implementation Guidelines............................................................................ 162
Activity 7.2: Determining Data Integrity Implementations ........................... 163
Review ................................................................................................................ 164
Guidelines ...................................................................................................... 165

Review Questions .......................................................................................... 166
Looking Forward ........................................................................................... 167
Module 8: Designing Data Services
Overview............................................................................................................. 171