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Questions by Ashutosh_17
1
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1
Database: Keys
Consider a relation R(ABCDEFGH). How many superkey will be there in relation Rif candidate key for relation are {A, BC, CDE, EF}?
Consider a relation R(ABCDEFGH). How many superkey will be there in relation Rif candidate key for relation are {A, BC, CDE, EF}?
795
views
asked
May 21, 2023
Databases
databases
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0
votes
1
answer
2
Database : Minimal cover How to approch this type of questions?
2.1k
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asked
May 21, 2023
Databases
databases
canonical-cover
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0
votes
1
answer
3
Discrete Maths Partial ordered set
[D6 , / ] is a poset ?
[D6 , / ] is a poset ?
280
views
asked
Apr 20, 2023
Mathematical Logic
discrete-mathematics
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0
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0
answers
4
Database ER model
Consider the following relation (capitalized letters are attributes and lower letters are values). X: From the given FDs find the dependencies that seems to apply on X and identify a possible key (Candidate key) for X. A→C,D→E,C→A,E→B E→A,C→B,B→D,B→A
Consider the following relation (capitalized letters are attributes and lower letters are values).X:From the given FDs find the dependencies that seems to apply on X and ...
424
views
asked
Apr 13, 2023
Databases
databases
er-diagram
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1
votes
2
answers
5
Database ER model
An ER diagram is having two strong entities E1 and E2. The relationship between the entities ‘R’ is having partial participation from E1 side and total participation from E2 side with 1:1 cardinality. The entities E1 and E2 are having one multivalued attribute each. How many numbers of relations are required to represent the ER model into the relational model?
An ER diagram is having two strong entities E1 and E2. The relationship between the entities ‘R’ is having partial participation from E1 side and total participation ...
895
views
asked
Apr 13, 2023
Databases
databases
er-diagram
relational-model
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0
votes
1
answer
6
Database: Relational Algebra
Let R be a relation of degree 5 then the total number of projections possible on R is ___?
Let R be a relation of degree 5 then the total number of projections possible on R is ___?
789
views
asked
Mar 30, 2023
Databases
relational-algebra
databases
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0
votes
0
answers
7
Subject : Databse Topic: 2pl locking protocol..... If the given schedule is allowed under any 2pl( basic 2pl,strict or rigorous) then it is also allowed in conflict serializble , so if the schedule which is allowed in conflict serializable then also we can say it will be allowed in 2pl?
292
views
asked
Mar 28, 2023
Databases
databases
2phaselocking
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