Download 03_IntroAccess&DM

Intro to Access and Data
Management
Announcements
• No Class – Monday
• Chapter 5 – Wednesday
• Access Tutorial & DB Creation - Friday
The Database Approach
Database management system (DBMS)
Minimize the following problems:
1. Data redundancy
2. Data isolation
3. Data inconsistency
Maximize the following:
1. Data security
2. Data integrity
3. Data independence
How is data organized in a DB:
Data Hierarchy
Field
Is a grouping of
Record
Is a grouping of
File (or table)
Is a grouping of
Database
Data Hierarchy (continued)
Field
Table
Database
Record
Database Management Systems
Database management system (DBMS)
Focus of this course: Relational database model


Related Tables (Primary Keys Important)
Data dictionary
 How do you request data?

Structured Query Language (SQL) - keywords

Query by Example (QBE) – forms/templates
Relational DB Effectiveness:
Normalization
Normalization (most streamlined DB)
Minimum redundancy
Maximum data integrity
Best processing performance
Normalized data occurs when attributes in the
table depend only on the primary key.
Exercise #1 – Online Shopping DB
Create a new DB called OnlineShopping
that will consist of three tables.
 Customers
 Orders
 Products
Exercise #1 – Online Shopping DB
Customers
Data_Type
Field Size
CustomerID
FirstName
LastName
Address
City
State
PostalCode
PhoneNum
Text
Text
Text
Text
Text
Text
Text
Text
5
50
100
150
30
2
Input Mask
Input Mask
Products
ProductID
ProductName
Category
Cost
Data_Type Field Size
Text
Text
Text
?
5
50
50
Orders
OrderNo
CustomerID
ProductID
OrderDate
Data_Type
Field Size
?
?
?
?
?
?
Exercise #1 – Online Shopping DB
Create the appropriate relationships for
the tables in your database.
 Customers -> Order
 Products -> Order
Exercise #1 – Online Shopping DB
Enter information into tables.
Customers
CustomerID FirstName LastName
Address
CIty
State PostalCode PhoneNumber
1111
Michael Jordan
123 Anywhere Rd Wilmington NC
28401 (910) 555-5555
2222
Larry
Bird
456 Somewhere St French Lick IN
47432 (812) 555-5555
3333
Irvin
Johnson 789 Nowhere Ave Los Angeles CA
90001 (213) 555-5555
Products
ProductID ProductName
Category
00001
Basketball
Sporting Goods
00002
Shorts
Apparel
00003
Shoes
Apparel
Cost
$25.00
$20.00
$75.00
Orders
OrderNo CustomerID ProductID
1
1111
00002
2
2222
00001
3
3333
00003
4
1111
00001
autonumber
OrderDate
9 /18/2012
9 /18/2012
9 /18/2012
9 /20/2012
Exercise #1 – Online Shopping DB
Create a query to answer the following
question:
What is the total amount spent on all orders
by each customer?