May 2024
Beginner
313 pages
11h 34m
English
Content preview from Basic Computer Engineering (Subject Code: BE - 205) by Pearson
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Database Management System 10.11
A parent can have none, one, or more children. A child can have only one parent.
The parent-child relationship is suited for the modeling of one-to-many relationship between two
entities.
It is diffi cult to implement a many-to-many relationship using hierarchical database model.
Some of the hierarchical database implementations are the IMS system from IBM and System
2000 from MRI systems.
10.5.2.3 Network Database Model
The Network Database Model was formalized by DataBase Task Group (DBTG) group of Conference
on Data Systems Languages (CODASYL) in the late 1960s. The Network Database ...
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