Computer Science - Database Systems - Discussion
Discussion Forum : Database Systems - Section 1 (Q.No. 20)
20.
A top-to-bottom relationship among the items in a database is established by a
Discussion:
2 comments Page 1 of 1.
Hammad said:
5 years ago
Anyone explain it please.
Arun Rajput said:
7 years ago
E-R model is a top-down approach,
A specialization is a top-down approach.
But;
A generalization is a bottom-up approach.
A specialization is a top-down approach.
But;
A generalization is a bottom-up approach.
(1)
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