1. Databases Topic 4 Text Materials Chapter 3 – Databases and Data Warehouses

2. Concepts Data should be: - Available - Up-to-date/current - Error free - Accessible - Useful - Secure - Well organized - Not redundant Types of data, Traditional - Customer - Billing - Assets - Liabilities - Payroll - Sales - Payables due - Inventory - Customer payment history Types of data, Multimedia - Pictures of products - Training videos - Web pages - Product views and instructions

3. Data

4. Convenience Stores Benefits

5. Departmental Database Use Finance and Accounting Human Resources Manufacturing, Production, Operations Marketing and Sales

6. Before Databases Issues  inefficient, costly, inaccurate, slow, inflexible. ?

7. A Database is... A collection of related files containing records on people, places, or things. DBMS - Software that gives the ability to create, manipulate, and access data. - Used to process transactions and store business information. RDBMS – Relational, data is contained in Tables that are easily related to each other. Today most popular type of DBMS. Our focus. Oracle, IBM DB2, SQL, Access

8. Some Database Terminology Table – A grouping of rows and columns that contain data about something. The rows are called records which are information about a single item in a table. The columns are called fields which are a single characteristic of a record. Common fields are used to connect records that are in separate tables.

9. Concepts Database Operating System RDBMS

10. A Table, Records, and Fields

11. Database Basic Functions Create, Maintain, and Update Data (such as employees, transactions, or products) Interrogate (called a Query) Generate Reports Build applications

12. An Access Table

13. An Access Form

14. An Access Report

15. Types of Table Relationships in a RDBMS One-to-Many (1:n) One record in the first table matches many records in the second table, and one record in the second table matches back to exactly one record in the first table. One-to-One (1:1) One record in the first table matches one record in the second table, and one record in the second table matches back to exactly one record in the first table. Many-to-Many (n:n) One record in the first table matches many records in the second table, and one record in the second table matches back to many records in the first table. Examples: Students and Professors Departments and Professors Authors and Books Students and Cars Employees and Desks Customers and Orders

16. Object-Oriented Databases

17. Data Warehouses

19. Challenges in Data Resource Management Vast amounts of data Secure Available Back up / Archive Easy to use Handle growth Specialists

20. Trips Relational Database – A simple example

24. Database Query Results

25. Class Exercise Go to the instructor website www.uta.edu/faculty/weltman and download the rafting trip database.www.uta.edu/faculty/weltman Use the database and QBE (query by example) tool to show all our Colorado trips. Print out and turn in your query results.

26. Class Exercise

29. Online Analytical Processing - OLAP