Next: Overall System Structure
Up: Table of Contents
Previous: Table of Contents
Chapter 7
-
We have been looking mostly at the higher-level models of a database.
At the conceptual or logical level the database was
viewed as
- A collection of tables (relational model).
- A collection of record types and sets (network model).
- A forest of tree structures (hierarchical model).
-
The logical model is the correct level for database users to focus on.
However, performance depends on the efficiency of the data
structures used to represent data in the database, and on the efficiency of
operations on these data structures.
Page created and maintained by Osmar R. Zaï ane
Last Update:
Tue Oct 31 12:59:25 PST 1995