PostgreSQL Exam PGCES-02 Topic 5 Question 87 Discussion

Actual exam question for PostgreSQL's PGCES-02 exam

Question #: 87
Topic #: 5

[All PGCES-02 Questions]

Select one incorrect statement concerning the relational data model.

AIt expresses the real world in a collection of 2-dimensional tables called a relation.

BIt is a model based on set theory.

CIt has a logical structure independent of physical data structure.

DIt is made up of a multiple stage hierarchy where each of the set elements has parent child relationships.

EIt is a model that was proposed by E.F . Codd in 1970.

Show Suggested Answer

Suggested Answer: D

by Iraida at Jul 03, 2025, 04:39 PM

Limited Time Offer

25%

Off

Contribute your Thoughts:

Submit Cancel

8 days ago

Option E is the one - Codd proposed the relational model back in 1970, that's a classic fact.

upvoted 0 times

...

11 days ago

A and B sound spot on to me. Can't go wrong with those choices.

upvoted 0 times

3 days ago

C) It has a logical structure independent of physical data structure.

upvoted 0 times

...

13 days ago

I think the incorrect statement is D.

upvoted 0 times

...

16 days ago

Option D is definitely incorrect. The relational model doesn't have a hierarchy structure, it's all about tables and relationships between them.

upvoted 0 times

19 hours ago

A) It expresses the real world in a collection of 2-dimensional tables called a relation.

upvoted 0 times

...