when would a database designer need to createin a artifical key? a)when no simple or composite primary key exist in a table b) When the primary key is identical to the supertype primary key. c) When there is no single columns key avialable d) When there is an ISA relationship in a table
when would a database designer need to createin a artifical key? a)when no simple or composite primary key exist in a table b) When the primary key is identical to the supertype primary key. c) When there is no single columns key avialable d) When there is an ISA relationship in a table
Principles of Information Systems (MindTap Course List)
13th Edition
ISBN:9781305971776
Author:Ralph Stair, George Reynolds
Publisher:Ralph Stair, George Reynolds
Chapter5: Database Systems And Big Data
Section: Chapter Questions
Problem 14SAT
Related questions
Question
when would a
a)when no simple or composite primary key exist in a table
b) When the primary key is identical to the supertype primary key.
c) When there is no single columns key avialable
d) When there is an ISA relationship in a table
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