Jongwook Woo

Access Project: Creating and Using a Database

Cis100 Lab

Jongwook Woo, PhD

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What is Database

Access Database

What is the difference between Excel and Access

Access Relational Database

Table, Record, Key

Table relationship

Query

Contents

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Databases (DB)

Storing data

Database advantages

Sharing information: Transaction– One department to another

More functions– Security: Password to access– Less data redundancy

• Excess storage reduced– Data integrity: Consistent data

Database Management Systems (DBMS) Create, modify, gain access to databases We just call DBMS DB

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MS Access Database

Light Weight Database

Relational Database– Composed of tables– Data stored in tables

• Rows and columns– Record = row– Field = column

Small size DB For small business or individual usage

Industrial DB

Oracle, MS SQL, IBM DB2 MySQL (freeware)

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Excel vs DB (Access)

Same

Store data Composed of tables

Difference

Excel is for personal data DB is to share data for multiple users DB provides many data management functions

– Explained in the previous slides as DB

DB is for business

Excel is for the personal usage

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Creating a New Database

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Creating a Table

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Databases and Database Objects: An Introduction

8

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Defining the Fields in Client Table

Foreign key

primary key

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Key Field

Primary Key (Unique Key)

Unique identifier that links records logically

Common examples

– Social security number

– Driver’s license

– Credit card account

– Client Number

– Trainer number

Foreign Key

Primary Key of another table

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Relational Database

Tables related via common data item

Trainer Number Foreign Key for Client Table Primary Key for Trainer Table

Client Number

Name … Trainer Number

BS27 Blant … 42

… … … …

TE26 Telton … 48

Trainer Number

Last Name

… YTD earnings

42 Perry … $27,620

48 Stevens … $23,567

… … … …

primary key

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Trainer Table

primary key

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Creating an Additional Table

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Creating an Additional Table (Trainer Table)

Primary key is very important

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Query, Form, Report

Query

Select fields you want to retrieve and display from fields of a table

Combine and select fields you want to retrieve and display from fields of

tables

Access provides Query Wizard

Form

Display and navigate data of tables

Report

Display and print data of tables