Register

UGC NET CSE | June 2010 | Part 2 | Question: 20

• recategorized by
2,121 views

1 Answer

Best answer
3 votes
3 votes
the project command pi (or projection operation) will return  only the specified columns  removing duplicates

so choice a,b,c are not possible

ans is D
• selected by
User Avatar
Voting & Accepting an answer helps improve the community
← PreviousNext →
← Previous in categoryNext in category →

Related questions

0 votes
0 votes
1 answer
1
makhdoom ghaya asked Sep 15, 2016
2,506 views
UGC NET CSE | June 2010 | Part 2 | Question: 19
Which data management language component enabled the DBA to define the schema components ? DML Sub-schema DLL Schema DLL All of these
Which data management language component enabled the DBA to define the schema components ?DMLSub-schema DLLSchema DLLAll of these
User Avatar
1 votes
1 votes
2 answers
2
makhdoom ghaya asked Sep 15, 2016
3,376 views
UGC NET CSE | June 2010 | Part 2 | Question: 18
Match the following : ... $\text{a-iii, b-iv, c-i, d-ii}$ $\text{a-iii, b-ii, c-iv, d-i}$
Match the following :$\begin{array}{clccl} \text{a.} & \text{2 NF} & & \text{i.} & \text{Transitive dependencies eliminated} \\ \text{b.} & \text{3 NF} & & \text{ii.} ...
User Avatar
0 votes
0 votes
2 answers
3
makhdoom ghaya asked Sep 15, 2016
3,647 views
UGC NET CSE | June 2010 | Part 2 | Question: 17
Generalization is _______ process. Top-down Bottom up Both (A) & (B) None of these
Generalization is _______ process.Top-downBottom upBoth (A) & (B)None of these
User Avatar
1 votes
1 votes
4 answers
4
makhdoom ghaya asked Sep 15, 2016
2,519 views
UGC NET CSE | June 2010 | Part 2 | Question: 16
An entity instance is a single occurrence of an ______. Entity type Relationship type Entity and relationship type None of these
An entity instance is a single occurrence of an ______.Entity typeRelationship typeEntity and relationship typeNone of these
User Avatar
Link Copied!