Test by Bikram | Databases | Test 1 | Question: 10

Question

Consider the relation $R(A, B, C, D, E)$ with the set of function dependencies: $F = \{ AB \rightarrow C, \ \   D \rightarrow E, \ \  A \rightarrow D \}$  The candidate Key is _____

• A. BC     
• B. AB    
• C. BAC     
• D. AD

Comments

IF AB is candidate key then so is BA please correct this sir

Answer 1

CAN  someone please explain what does  B-→ C means???

Comments

And what does only A means sir

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A ->D and D->E so A-> E

from AB->C

so AB is candidate key

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ok got it thank you sir