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Database Systems by Shripad V. Godbole, Elvis C. Foster

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CHAPTER 2

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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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