The document provides an overview of database systems, including: 1) Database systems store and manage large amounts of related data and provide efficient access to that data. They solve problems with traditional file-based data storage like redundancy, data integrity, and concurrent access. 2) Databases are made up of structured data models like the relational model and object-oriented models. They include languages for defining, manipulating, and querying data. 3) Database management systems provide storage, query processing, transaction management, and an abstraction of the data through multiple levels including physical, logical and view levels.

1. Chapter 1: Introduction Database System Concepts, 5th Ed . ©Silberschatz, Korth and Sudarshan See www.db-book.com for conditions on re-use

7. View of Data 1.7 Database System Concepts - 5 th Edition, May 23, 2005 An architecture for a database system

13. A Sample Relational Database 1.13 Database System Concepts - 5 th Edition, May 23, 2005

18. Database Application Architectures 1.18 Database System Concepts - 5 th Edition, May 23, 2005 (web browser) Old Modern

21. Query Processing 1. Parsing and translation 2. Optimization 3. Evaluation 1.21 Database System Concepts - 5 th Edition, May 23, 2005

24. Overall System Structure 1.24 Database System Concepts - 5 th Edition, May 23, 2005

27. End of Chapter 1 Database System Concepts, 5th Ed . ©Silberschatz, Korth and Sudarshan See www.db-book.com for conditions on re-use

33. Figure 1.4 1.33 Database System Concepts - 5 th Edition, May 23, 2005

34. Figure 1.7 1.34 Database System Concepts - 5 th Edition, May 23, 2005