changes made on ranges of G3. Hence, D-K shows 42 of accuracy with 0.58 G3 errors. And E-K produces 0.37 G3 errors with 63 of accuracy of FD.
4.2.7 Summary output of table AE_L
This Table 18 shows the FD discovery summary for output of table AE_L in a simplified form.
Table 18. FDs discoveries in AE_F table with G3 ranges of 0.10 to 1.00 a
G3 range is 0.10 G3 0.10
0.01 0.05
A - B B-A
E-D A -C
B-C A -D
B-D A -E
B-E A -L
B-L L-D
A,B,D,E,L - C b
G3 range is 0.20 G3 0.20
0.01 0.05
0.15 0.19
A - B B-A
E-D E-L
D-L A -C
B-C A -D
B-D A -E
B-E A -L
B-L L-D
A,B,D,E,L - C c
G3 range is 0.30 G3 0.30
0.01 0.19
0.24 0.29
A - B B-A
D-L E-A
L-E A -C
B-C E-B
A -D B-D
E-C A -E
B-E E-D
A -L B-L
E-L L-D
A,B,D,E,L - C
67
d G3 range is 0.40
G3 0.40 0.01
0.19 0.24
0.35 0.37
A - B B-A
D-L E-A L-A
D-E A -C
B-C E-B
L-B A -D
B-D E-C
L-C A -E
B-E E-D
L-D A -L
B-L E-L
L-E A,B,D,E,L - C
e G3 range is 0.50
G3 0.50 0.01
0.24 0.35
0.46 A - B
B-A E-A
L-A D-A
A -C B-C
E-B L-B
D-B A -D
B-D E-C
L-C D-C
A -E B-E
E-D L-D
D-E A -L
B-L E-L
L-E D-L
A,B,D,E,L - C f
G3 range is 0.60 G3 0.60
0.01 0.24
0.35 0.46
A - B B-A
E-A L-A
D-A A -C
B-C E-B
L-B D-B
A -D B-D
E-C L-C
D-C A -E
B-E E-D
L-D D-E
A -L B-L
E-L L-E
D-L A,B,D,E,L - C
g G3 range is 0.70
G3 0.70 0.01
0.24 0.35
0.46 A - B
B-A E-A
L-A D-A
A -C B-C
E-B L-B
D-B A -D
B-D E-C
L-C D-C
A -E B-E
E-D L-D
D-E A -L
B-L E-L
L-E D-L
A,B,D,E,L - C
68
h G3 range is 0.80
G3 0.80 0.01
0.24 0.35
0.46 A - B
B-A E-A
L-A D-A
A -C B-C
E-B L-B
D-B A -D
B-D E-C
L-C D-C
A -E B-E
E-D L-D
D-E A -L
B-L E-L
L-E D-L
A,B,D,E,L - C i
G3 range is 0.90 G3 0.90
0.01 0.24
0.35 0.46
A - B B-A
E-A L-A
D-A A -C
B-C E-B
L-B D-B
A -D B-D
E-C L-C
D-C A -E
B-E E-D
L-D D-E
A -L B-L
E-L L-E
D-L A,B,D,E,L - C
j G3 range is 1.00
G3 1.00 0.01
0.91 0.92
0.93 0.99
1.00
A,B,D,E,L - C
A,B,C,E,L - D A,B,C,D,E - L A,B,C,D,L - E A,C,D,E,L - B B,C,D,E,L - A
69
Table 19. Overall FD accuracy and proxy table size analysis for table AE_L
Proxy G3
FDs Accuracy Percentage
Proxy table size
A -L 100
280 B-L
0.01 99
280 C-L
- -
- D-L
0.19 | 0.46 81 | 54
280 E-L
0.15 | 0.24 85 | 76
280 AB-L
- -
- AC-L
- -
- AD-L
- -
- AE-L
- -
- BC-L
- -
- BD-L
- -
- BE-L
- -
- CD-L
- -
- CE-L
- -
- DE-L
- -
- ABC-L
- -
- ABD-L
- -
- ABE-L
- -
- BCD-L
- -
- BCE-L
- -
- CDE-L
- -
- ABCD-L
- -
- ABCE-L
- -
- BCDE-L
- -
- ABCDE-L
0.92 8
840
In Table 19, attribute A, B, D and E are considered as candidate proxies. Though, all this can’t become good candidate proxies, since they show different G3 errors. A good
candidate proxy has zero G3 error with 100 accuracy FD attribute A. Candidate proxy B- L shows nearly zero error 0.01 G3 errors with 99 of FD presence can be considered as
good candidate proxy. Like in the previous case, even though D and E show two different G3 errors, we
have to consider the worst case scenario. Thus, D-L and E-L produce 0.46 54 FD accuracy and 0.24 76 FD accuracy G3 error respectively.
70
4.3 Summary of Space requirement results
