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Project:SPARQL/examples: Difference between revisions
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<sparql tryit="1"> | <sparql tryit="1"> | ||
# query to find small number of items/properties which don't have en | # query to find small number of items/properties which don't have "en" labels | ||
# this causes problems when needing to get labels without using SERVICE, or can't rely on AUTO_LANGUAGE | # this causes problems when needing to get labels without using SERVICE, or can't rely on AUTO_LANGUAGE | ||
# update: changing default to "en" rather than "en-gb" to reflect recommended practice, which I'd overlooked in the Maartens' report. There should be even fewer missing. | |||
PREFIX bnwd: <https://beyond-notability.wikibase.cloud/entity/> | PREFIX bnwd: <https://beyond-notability.wikibase.cloud/entity/> | ||
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SELECT | SELECT | ||
?item ? | ?item ?en ?itemLabel | ||
(group_concat(distinct ?language) as ?languages) | (group_concat(distinct ?language) as ?languages) | ||
(count(distinct ?rdfs_label) as ?count) # TIL: where you put distinct matters! | (count(distinct ?rdfs_label) as ?count) # TIL: where you put distinct matters! | ||
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BIND(LANG(?rdfs_label) as ?language) . # get 2 letter language codes | BIND(LANG(?rdfs_label) as ?language) . # get 2 letter language codes | ||
# optional to fetch en | # optional to fetch en (and/or) en-gb separately. if you change this, you need to also change the group by. | ||
optional { ?item rdfs:label ?engb . filter(lang(?engb)="en-gb"). } | #optional { ?item rdfs:label ?engb . filter(lang(?engb)="en-gb"). } | ||
optional { ?item rdfs:label ?en . filter(lang(?en)="en"). } # blank if item only has en-gb label | |||
SERVICE wikibase:label { bd:serviceParam wikibase:language "[AUTO_LANGUAGE],en-gb,en". } | SERVICE wikibase:label { bd:serviceParam wikibase:language "[AUTO_LANGUAGE], en-gb, en". } | ||
} | } | ||
group by ?item ? | group by ?item ?en ?itemLabel | ||
HAVING (?count<2) | HAVING (?count<2) | ||
order by ?item | order by ?item | ||
</sparql> | </sparql> | ||
=== Statements that contain both a date *and* an unknown value date=== | === Statements that contain both a date *and* an unknown value date=== | ||