It is an abstraction through which relationships are treated as higher level entities a. Generalization b. Specialization c. Aggregation d. Inheritance 5. The operation which is not considered a basic operation of relational algebra is a. Join b. Selection c. Union d. Cross product

Principles of Information Systems (MindTap Course List)
12th Edition
ISBN:9781285867168
Author:Ralph Stair, George Reynolds
Publisher:Ralph Stair, George Reynolds
Chapter5: Database Systems And Applications
Section: Chapter Questions
Problem 4PSE: Using a graphics program, develop an entity-relationship diagram for a database application for an...
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4. It is an abstraction through which relationships are treated as higher level entities
a. Generalization
b. Specialization
c. Aggregation
d. Inheritance
5. The operation which is not considered a basic operation of relational algebra is
a. Join
b. Selection
c. Union
d. Cross product
Transcribed Image Text:4. It is an abstraction through which relationships are treated as higher level entities a. Generalization b. Specialization c. Aggregation d. Inheritance 5. The operation which is not considered a basic operation of relational algebra is a. Join b. Selection c. Union d. Cross product
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