Database Reference
In-Depth Information
Table 15.1: The original database D
O
.
A
B
C
D
E
1
0
1
0
0
1
0
1
1
1
0
0
1
1
0
0
1
0
0
1
1
0
1
1
1
0
0
0
1
1
0
0
1
0
0
1
1
0
0
0
1
0
1
0
0
0
0
1
1
0
Table 15.2: The intermediate database of D
O
.
A
B
C
D
E
1
0
1
0
0
1
0
u
23
u
24
1
0
0
u
33
u
34
0
0
1
0
0
1
1
0
u
53
u
54
1
0
0
0
1
1
0
0
1
0
0
1
1
0
0
0
1
0
1
0
0
0
0
u
103
u
104
0
Table 15.3: The database D
H
.
A
B
C
D
E
1
0
1
0
0
1
0
1
1
1
0
0
1
0
0
0
1
0
0
1
1
0
0
1
1
0
0
0
1
1
0
0
1
0
0
1
1
0
0
0
1
0
1
0
0
0
0
1
0
0
ACE : u
23
+u
53
2
(15.2)
ADE : u
24
+u
54
2
(15.3)
CD : u
23
u
24
+u
33
u
34
+u
53
u
54
+u
103
u
104
< 2
(15.4)
The first two inequalities correspond to itemsets ACE and ADE, which must re-
main frequent in D, while the last one reflects the status of the sensitive itemset CD,
