CHAPTER 2
The Database System Environment
This chapter discusses the environment of a database system. Topics covered include:
- Levels of Architecture
- Inter-level Mappings
- Database Administrator
- Database Management System
- Components of the DBMS Suite
- Front-end and Back-end Perspectives
- Database System Architecture
- Summary and Concluding Remarks
2.1 Levels of Architecture
In [Date, 2004], Christopher Date describes three levels of architecture of a database system, namely, the external level, the conceptual level, and the internal level. These levels are illustrated in Figure 2-1; we will briefly discuss each.
Figure 2-1. Levels of DBS Architecture ...
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