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Figure 5.1 Hierarchy of data for a computer-based file.

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Presentation on theme: "Figure 5.1 Hierarchy of data for a computer-based file."— Presentation transcript:

1 Figure 5.1 Hierarchy of data for a computer-based file.

2 Figure 5.2 Indexed sequential access method.

3 Figure 5.3 Computer based files in the traditional file environment cause problems such as redundancy due to partial or full duplication, inconsistency across files, and data isolation.

4 Figure 5.4 Database Management System (DBMS) provides access to all data in the database.

5 Figure 5.5 (a) Centralized database

6 Figure 5.5 (b) Distributed database with complete or partial copies of the central database in more than one location.

7 Figure 5.6 Entity-Relationship model

8 Figure 5.7 Non-normalized relation

9 Figure 5.8 Normalized relation

10 Figure 5.9 Hierarchical database model

11 Figure 5.10 Network database model

12 Figure 5.11 Table of relational database model

13 Figure 5.12 Data warehouse framework and views [Source: and Data Management Strategies, Cutter Information Operations, February 1999.]

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15 Figure 5.13 Relational databases

16 Figure 5.14 Multidimensional databases

17 Figure 5.15 Equivalence between relational and multidimensional databases

18 Figure 5.15 (Continued)

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