Conjunctive Queries
Conjunctive Queries
Conjunctive Queries
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d:<br />
3 8<br />
3 7<br />
5 7<br />
6 7<br />
d(Y,P)<br />
r(Y,Z,U)<br />
<br />
r:<br />
3 8 9<br />
9 3 8<br />
8 3 8<br />
3 8 4<br />
3 8 3<br />
8 9 4<br />
9 4 7<br />
…<br />
d:<br />
3 8<br />
3 7<br />
5 7<br />
6 7<br />
d(Y,P)<br />
r(Y,Z,U)<br />
<br />
r:<br />
3 8 9<br />
9 3 8<br />
8 3 8<br />
3 8 4<br />
3 8 3<br />
8 9 4<br />
9 4 7<br />
…<br />
s:<br />
3 8 9<br />
9 3 8<br />
8 3 8<br />
3 8 4<br />
3 8 3<br />
8 9 4<br />
9 4 7<br />
s(Z,U,W)<br />
t(V,Z)<br />
t:<br />
9 8<br />
9 3<br />
9 5<br />
s:<br />
3 8 9<br />
9 3 8<br />
8 3 8<br />
3 8 4<br />
3 8 3<br />
8 9 4<br />
9 4 7<br />
s(Z,U,W)<br />
t(V,Z)<br />
t:<br />
9 8<br />
9 3<br />
9 5<br />
d:<br />
3 8<br />
3 7<br />
5 7<br />
6 7<br />
d(Y,P)<br />
r(Y,Z,U)<br />
<br />
r:<br />
3 8 9<br />
9 3 8<br />
8 3 8<br />
3 8 4<br />
3 8 3<br />
8 9 4<br />
9 4 7<br />
d:<br />
3 8<br />
3 7<br />
5 7<br />
6 7<br />
d(Y,P)<br />
r(Y,Z,U)<br />
<br />
r:<br />
3 8 9<br />
9 3 8<br />
8 3 8<br />
3 8 4<br />
3 8 3<br />
8 9 4<br />
9 4 7<br />
s:<br />
3 8 9<br />
9 3 8<br />
8 3 8<br />
3 8 4<br />
3 8 3<br />
8 9 4<br />
9 4 7<br />
s(Z,U,W)<br />
t(V,Z)<br />
t:<br />
9 8<br />
9 3<br />
9 5<br />
s:<br />
3 8 9<br />
9 3 8<br />
8 3 8<br />
3 8 4<br />
3 8 3<br />
8 9 4<br />
9 4 7<br />
s(Z,U,W)<br />
t(V,Z)<br />
t:<br />
9 8<br />
9 3<br />
9 5