1. Ch6. Introduction to Database

2. What is a Database? Database is a collection of related information. It is organized so that it can easily be accessed, managed, and updated.

3. In the past… Information storage & retrieval Index card in a library

4. In the past… Information storage & retrieval Customer information on index cards

5. Present.. Use of database will… Reduced data entry, storage, and retrieval costs.

6. Present.. Use of database will… Multi users access database at the same time.

7. Present.. Use of database will… Data Security is improved. Login is needed & different users have different access right to database.

8. Examples of database system Personal phone book

9. Examples of database system Employee records of a company

10. Examples of database system Stock control of a supermarket

11. Examples of database system Student records of a school

12. Hierarchy of data organization Database Tables Records Fields

13. Database Management System UsersDBMSDatabase

14. Ensure Data Integrity Continues to be accessible. Consistently organized.

15. Ensure Data Security Make sure only those with right can access the data. i.e. Username and password is needed to access the data. (Microsoft Access don’t have this function)