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Select one incorrect statement concerning the relational data model.
Suggested Answer: D
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30 comments · newest first
AN
Anna
10 months ago
Wait, are we sure about E? Codd's work was groundbreaking!
HO
Hollis
10 months ago
Totally agree with Willow, D is the odd one out.
LA
Lakeesha
10 months ago
A is correct, that's how relations work!
LA
Laquita
10 months ago
B is spot on, set theory is the foundation of this model.
WI
Willow
10 months ago
D sounds off, relational models aren't hierarchical.
CO
Cornell
11 months ago
I thought all the other options were accurate, but D really stands out as the odd one out.
LI
Lisbeth
11 months ago
I practiced a similar question, and I feel like the hierarchy mentioned in D doesn't fit with how relations work.
DO
Dominga
11 months ago
I'm not entirely sure, but I remember something about E.F. Codd proposing the model, so E might be correct.
CA
Carmen
11 months ago
I think option D sounds wrong because the relational model is more about tables than hierarchies.
HE
Helaine
11 months ago
Option A sounds right to me - the relational model does express the real world in 2-dimensional tables.
GO
Golda
12 months ago
I remember the relational model has a logical structure independent of the physical data structure, so I'll rule out option D.
VE
Veda
12 months ago
The relational model was proposed by Codd in 1970, so option E seems like the correct answer.
CA
Carri
12 months ago
Hmm, I'm a bit confused about the hierarchy part. I'll have to think through that one carefully.
NA
Nancey
1 year ago
I'm pretty sure the relational data model is based on set theory, so I'll go with option B.
VA
Valentin
1 year ago
I disagree, I think the incorrect statement is A because the relational data model does not necessarily have to be represented in 2-dimensional tables.
RA
Rashida
1 year ago
I believe the correct answer is D as well, because the relational data model is not based on a hierarchy.
WY
Wynell
1 year ago
Wow, D really threw me off. Hierarchy? In a relational model? That's as off-base as a fish on a bicycle!
NO
Noemi
1 year ago
B) It is a model based on set theory.
LE
Lemuel
1 year ago
A) It expresses the real world in a collection of 2-dimensional tables called a relation.
GE
Gene
1 year ago
I agree with Yan, D is incorrect because the relational data model does not have a multiple stage hierarchy.
NO
Norah
1 year ago
Option E is the one - Codd proposed the relational model back in 1970, that's a classic fact.
KR
Kristofer
1 year ago
A and B sound spot on to me. Can't go wrong with those choices.
FL
Florencia
1 year ago
E) It is a model that was proposed by E.F . Codd in 1970.
CO
Corazon
1 year ago
D) It is made up of a multiple stage hierarchy where each of the set elements has parent child relationships.
LA
Laila
1 year ago
C) It has a logical structure independent of physical data structure.
YA
Yan
1 year ago
I think the incorrect statement is D.
SH
Shakira
1 year ago
Option D is definitely incorrect. The relational model doesn't have a hierarchy structure, it's all about tables and relationships between them.
MA
Mary
1 year ago
C) It has a logical structure independent of physical data structure.
AI
Ailene
1 year ago
B) It is a model based on set theory.
DE
Delsie
1 year ago
A) It expresses the real world in a collection of 2-dimensional tables called a relation.