chapter 2 introduction to database development database processing david m. kroenke © 2000 prentice...
Post on 23-Dec-2015
357 Views
Preview:
TRANSCRIPT
Chapter 2Introduction to
Database Development
Database Processing
David M. Kroenke© 2000 Prentice Hall
Database Components
Page 26 Figure 2-1 © 2000 Prentice Hall
Chapter 2
© 2000 Prentice Hall
Types of Data
• User data• Metadata• Indexes• Application Metadata
Page 25
Chapter 2
© 2000 Prentice Hall
User Data
• A table of data called a relation• Columns are fields or attributes• Rows are entities• Relations must be structured
properly
Page 26
Chapter 2
© 2000 Prentice Hall
Metadata
Page 27
“A description of the structure of the database”
• System tables store metadata– number of tables and table names– number of fields and field names– primary key fields– field names, data types, and length
Chapter 2
© 2000 Prentice Hall
Indexes
• Improve performance• Improve accessibility• (Overhead data)
Page 28
Chapter 2
© 2000 Prentice Hall
Page 29
Application Metadata
• Stores the structure and format of– forms– reports– queries– other application components
Chapter 2
© 2000 Prentice Hall
Page 29
The DBMS
• Design Tools Subsystem• Run-Time Subsystem• DBMS Engine
Chapter 2
© 2000 Prentice Hall
The Design Tools Subsystem
Page 29
• Tools to design and develop– tables– forms– queries– reports
• Programming Languages– macros– languages
Chapter 2
© 2000 Prentice Hall
Run-Time Subsystem
Chapter 1
Page 30
• Processes database components created by design tools
Chapter 2
© 2000 Prentice Hall
DBMS Engine
Page 30
• Intermediary between the design tools and run-time subsystems and the data
• Also handles . . .– transaction management– locking– backup and recovery
Chapter 2
© 2000 Prentice Hall
Page 30
Database Schema
• Defines a database’s structure– tables - subjects within the database– relationships - one-to-many or 1:N– domains - set of values a column may
have– business rules - restrictions on data
values
Table Design in Access 2000
Page 32 Figure 2-4© 2000 Prentice Hall
Relationships in Access 2000
Page 32 Figure 2-5© 2000 Prentice Hall
Chapter 2
© 2000 Prentice Hall
Page 34
Components of Applications
• Forms• Queries• Reports• Menus• Application Programs
Forms in Access 2000
Page 34 Figure 2-6a© 2000 Prentice Hall
Forms in Access 2000
Page 34 Figure 2-6b© 2000 Prentice Hall
Forms in Access 2000
Page 34 Figure 2-6c© 2000 Prentice Hall
Queries in Access 2000
Page 34 Figure 2-8
Reports in Access 2000
Page 34 Figure 2-10
Menus in Access 2000
Page 34 Figure 2-12
Visual Basic in Access 2000
Page 34 Figure 2-14
Chapter 2
© 2000 Prentice Hall
Database Development Process Terminology
Page 41
• Prototype - sample database• Top-down development - general
to specific (global perspective)• Bottom-up development - specific
to general (faster, less risky)
Chapter 2
© 2000 Prentice Hall
Data Modeling
Page 42
• Interviewing users• documenting requirements• building a data model• building a database prototype• a process of inference (working
backwards)
Chapter 2
© 2000 Prentice Hall
Data Models
Page 44
• Entity-Relationship Model• Semantic Object Model
top related