1. Databases The Fundamentals

5. Example DB with more than 1 theme A DB however can manage multiple Theme

8. Figure 4-3 Student Table (also called File)

11. High Quality Information Accuracy Are all values correct? Is name spelt correctly or $ amount right. Completeness Are any values missing? Does address include state and zip code? Consistency Is aggregate or summary information in agreement with detailed information? Example, do all total fields equal the true total of individual fields? Uniqueness Is each transaction, entity, and event represented only once in the information? Are their duplicate customers? Timeliness Is information current with respect to the business requirements? Is data updated weekly, daily, or hourly?

16. Database Advantages Increased Flexibility Needs to be able to handle changes quickly; It also needs to be able to allow users to use information in the many different ways they may need to Increased Scalability & Performance Manages large masses of information and large numbers of users in ways non-technical solutions could not! Reduced Redundancy Keeps organizations from storing the same information in multiple places Increased Integrity Is a measure of the quality of information. Integrity constraints are rules that help ensure the quality of information Increased Security Managed with passwords and levels of authorizations

19. Model of a typical Data Warehouse