Masters Theses


Prototype and performance analysis of a multi-layered database system using concept hierarchies

Keywords and Phrases

Multi-layered database; Concept hierarchies


"This thesis presents an implementation of the concept hierarchy operator where a given base table/tables is transformed to its corresponding summary tables at different levels. The transformation is based on the functional dependencies between attributes. The three types of summarization are horizontal, vertical and dual summarization. The implemented system takes the base table/tables from the Oracle database server, uses the concept hierarchy operator and generates the horizontal, vertical and dual summary tables which are stored back into the database. These summary tables represent a less secure and generalized upper layer in the multi-layered database (MLDB) model. Additional features built into the system are source cardinality, range values for numerical attributes and randomization of static attributes when summarized. In addition to the system development, performance and cost-benefit analyses were done over completely new experimental schema taken from the Internet"--Abstract, page iii.


Computer Science

Degree Name

M.S. in Computer Science


University of Missouri--Rolla

Publication Date

Fall 2004


ix, 80 pages


© 2004 Toby Thomas Kurien, All rights reserved.

Document Type

Thesis - Citation

File Type




Subject Headings

Information retrieval
Information storage and retrieval systems

Thesis Number

T 8691

Print OCLC #


Link to Catalog Record

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