5. List THREE (3) major DBMS
Models (NOT usages; by models, I mean different ways of logically (or
physically) conceptualizing the manner in which data is manipulated). For EACH
of the models, list ONE (1) advantage and ONE (1) disadvantage to the approach.
NO TWO MODELS SHOULD HAVE THE SAME ADVANTAGE OR DISADVANTAGE.
|
DBMS Components |
Functions/Subcomponents |
|
Database Development |
Data Definition Languages Data Dictionaries Data Storage maintenance Data Transformation |
|
Database Interrogation
(Query) |
Query Languages Multi-Access Controls Communication Interfaces |
|
Database Maintenance |
Updating of Indices Database
Integrity/Reference Checking Security Management Backup and Recovery |
|
Application Development |
Report Generation Project Development Data manipulation Languages |