1. Simple Database

2. Objectives
Identify Type of databases (based on relationship of the data)
Remember Database models (based on management software)
How to access the database (SQL)

3. Types of Databases (data relationship)
Hierarchical
Relational
Object-oriented

4. Hierarchical Databases

5. Relational Database
Holds data in a group of tables that can be related to one another by columns they have in common
Column headings are called field names
Rows are called records, which are made up of individual fields
Each row of data can be identified uniquely by the content of one or more fields (primary key)
Result of a database search is called a query

7. Object-Oriented Database
Holds objects such as BLOB (Binary Large Object) data types that hold video clips, graphics, photographs, and other large binary data

8. Database models (based on management software)
File server
Client/Server Database Model
Internet Client/Server Database Model

9. File Server Model

10. Client/Server Database Model
Some database management software is on the client, some is on the server that contains the database
2-tier model (client and server)
Used in most Internet applications today

11. Client/Server Database Model

12. Internet Client/Server Database Model
Differs from traditional client/server model:
Neither client nor server portions of database software are on the PC of the Internet user
The browser on the user’s PC accesses a database via the client/server model (client is on the web site and server has direct access to the database)
3-tier model (browser, client, server)
Advantage
Client PC does not need to contain database management software

13. Internet Client/Server Database Model

14. Use SQL (Structured Query Language) to Access Data
The standard for the command set used to interface with most databases
Database engine
Applications software that provides a user with an interface to the DBMS
Database server
Computer that contains the database and the DBMS

15. Summary Type of databases (based on relationship of the data)
Database models (based on management software)
How to access the database (SQL)