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| << 6. Functional Dependencies | 8. Examination Questions 1998-1999 >> |
7. NormaalvormenWerner Van Belle1 - werner@yellowcouch.org, werner.van.belle@gmail.com Abstract : Why normal forms ?
Reference:
Werner Van Belle; Normaalvormen; |
Welke van de volgende relaties staan in 3e normaalvorm, BCNF ?
R1:
|
A |
B |
C |
D |
E |
F |
|
A |
B |
C |
D |
E |
F |
|
G |
H |
A |
B |
I |
H |
|
B |
C |
B |
C |
G |
H |
|
A |
B |
C |
C |
I |
E |
R3:
|
A |
B |
C |
D |
E |
F |
|
A |
B |
C |
D |
I |
F |
|
A |
B |
A |
B |
I |
H |
|
B |
C |
B |
C |
G |
H |
|
A |
B |
C |
C |
I |
H |
R4:
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A |
B |
C |
D |
|
A |
B |
C |
D |
|
A |
B |
A |
D |
|
B |
C |
B |
C |
|
A |
B |
C |
C |
Is in R4 C ->-> A ?
Is in R5 C->-> A ?
R5:
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A |
B |
C |
D |
|
A |
B |
C |
D |
|
A |
B |
A |
D |
|
B |
C |
B |
C |
|
A |
B |
C |
C |
|
B |
B |
C |
D |
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