ITPEC FE Morning April 2021 Question 25
ITPEC FE Morning April 2021 — Question 25 of 80
Relational Database Definition — identify the correct description of a relational DB model.
A relational database stores data in tables (relations), and tables are linked to one another through column values (foreign keys).
Why not others:
- (b) — describes an index structure (attribute value + storage location pair), not a relational model
- (c) — describes a network database model — uses links that support both tree and network structures
- (d) — describes a hierarchical database model — uses pointers limited to tree structures only
Key rule: Relational = tables + links via column values (keys). Network = links (tree + network). Hierarchical = pointers (tree only).
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