SPARQL: Find all artist living in the same city
0
How do I select all artists (or all x) living in the same city (or y) if the city (y) is not specified?
I just tried to query it like (generic example):
SELECT ?x1 ?x2 ?y1
WHERE {
?x1 :livesIn ?y1.
OPTIONAL {?x2 :livesIn ?y2.}
FILTER(?y1 = ?y2)
}
filter sparql
edited Nov 23 '18 at 4:41
Skynet
4,32452640
asked Nov 22 '18 at 14:40
ChrisiDChrisiD
183
add a comment |
0
How do I select all artists (or all x) living in the same city (or y) if the city (y) is not specified?
I just tried to query it like (generic example):
SELECT ?x1 ?x2 ?y1
WHERE {
?x1 :livesIn ?y1.
OPTIONAL {?x2 :livesIn ?y2.}
FILTER(?y1 = ?y2)
}
filter sparql
edited Nov 23 '18 at 4:41
Skynet
4,32452640
asked Nov 22 '18 at 14:40
ChrisiDChrisiD
183
1
And what does not work? Why not using the same variableyfor bothx1andx2. Moreover, you should omit samex_i:SELECT ?x1 ?x2 ?y1 WHERE { ?x1 :livesIn ?y1. ?x2 :livesIn ?y1. FILTER(?x1 != ?x2)- I don't know what you mean by "if the city is unknown" - in that case no comparison is possible, or not?
– AKSW
Nov 22 '18 at 17:35
add a comment |
0
0
0
How do I select all artists (or all x) living in the same city (or y) if the city (y) is not specified?
I just tried to query it like (generic example):
SELECT ?x1 ?x2 ?y1
WHERE {
?x1 :livesIn ?y1.
OPTIONAL {?x2 :livesIn ?y2.}
FILTER(?y1 = ?y2)
}
filter sparql
edited Nov 23 '18 at 4:41
Skynet
4,32452640
asked Nov 22 '18 at 14:40
ChrisiDChrisiD
183
How do I select all artists (or all x) living in the same city (or y) if the city (y) is not specified?
I just tried to query it like (generic example):
SELECT ?x1 ?x2 ?y1
WHERE {
?x1 :livesIn ?y1.
OPTIONAL {?x2 :livesIn ?y2.}
FILTER(?y1 = ?y2)
}
filter sparql
filter sparql
edited Nov 23 '18 at 4:41
Skynet
4,32452640
asked Nov 22 '18 at 14:40
ChrisiDChrisiD
183
edited Nov 23 '18 at 4:41
Skynet
4,32452640
asked Nov 22 '18 at 14:40
ChrisiDChrisiD
183
edited Nov 23 '18 at 4:41
Skynet
4,32452640
edited Nov 23 '18 at 4:41
Skynet
4,32452640
edited Nov 23 '18 at 4:41
Skynet
4,32452640
4,32452640
asked Nov 22 '18 at 14:40
ChrisiDChrisiD
183
asked Nov 22 '18 at 14:40
ChrisiDChrisiD
183
asked Nov 22 '18 at 14:40
ChrisiDChrisiD
183
183
1
And what does not work? Why not using the same variableyfor bothx1andx2. Moreover, you should omit samex_i:SELECT ?x1 ?x2 ?y1 WHERE { ?x1 :livesIn ?y1. ?x2 :livesIn ?y1. FILTER(?x1 != ?x2)- I don't know what you mean by "if the city is unknown" - in that case no comparison is possible, or not?
– AKSW
Nov 22 '18 at 17:35
add a comment |
1
And what does not work? Why not using the same variableyfor bothx1andx2. Moreover, you should omit samex_i:SELECT ?x1 ?x2 ?y1 WHERE { ?x1 :livesIn ?y1. ?x2 :livesIn ?y1. FILTER(?x1 != ?x2)- I don't know what you mean by "if the city is unknown" - in that case no comparison is possible, or not?
– AKSW
Nov 22 '18 at 17:35
1
1
And what does not work? Why not using the same variable
y for both x1 and x2. Moreover, you should omit same x_i: SELECT ?x1 ?x2 ?y1 WHERE { ?x1 :livesIn ?y1. ?x2 :livesIn ?y1. FILTER(?x1 != ?x2) - I don't know what you mean by "if the city is unknown" - in that case no comparison is possible, or not?– AKSW
Nov 22 '18 at 17:35
And what does not work? Why not using the same variable
y for both x1 and x2. Moreover, you should omit same x_i: SELECT ?x1 ?x2 ?y1 WHERE { ?x1 :livesIn ?y1. ?x2 :livesIn ?y1. FILTER(?x1 != ?x2) - I don't know what you mean by "if the city is unknown" - in that case no comparison is possible, or not?– AKSW
Nov 22 '18 at 17:35
add a comment |
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1
And what does not work? Why not using the same variable
yfor bothx1andx2. Moreover, you should omit samex_i:SELECT ?x1 ?x2 ?y1 WHERE { ?x1 :livesIn ?y1. ?x2 :livesIn ?y1. FILTER(?x1 != ?x2)- I don't know what you mean by "if the city is unknown" - in that case no comparison is possible, or not?– AKSW
Nov 22 '18 at 17:35