{"id":"https://openalex.org/W1486664688","doi":"https://doi.org/10.1023/a:1020197923385","title":"Aggregate Queries Over Conditional Tables","display_name":"Aggregate Queries Over Conditional Tables","publication_year":2002,"publication_date":"2002-11-01","ids":{"openalex":"https://openalex.org/W1486664688","doi":"https://doi.org/10.1023/a:1020197923385","mag":"1486664688"},"language":"en","primary_location":{"id":"doi:10.1023/a:1020197923385","is_oa":false,"landing_page_url":"https://doi.org/10.1023/a:1020197923385","pdf_url":null,"source":{"id":"https://openalex.org/S36033921","display_name":"Journal of Intelligent Information Systems","issn_l":"0925-9902","issn":["0925-9902","1573-7675"],"is_oa":false,"is_in_doaj":false,"is_core":true,"host_organization":"https://openalex.org/P4310319900","host_organization_name":"Springer Science+Business Media","host_organization_lineage":["https://openalex.org/P4310319900","https://openalex.org/P4310319965"],"host_organization_lineage_names":["Springer Science+Business Media","Springer Nature"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Journal of Intelligent Information Systems","raw_type":"journal-article"},"type":"article","indexed_in":["crossref"],"open_access":{"is_oa":false,"oa_status":"closed","oa_url":null,"any_repository_has_fulltext":false},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5022059310","display_name":"Jens Lechtenb\u00f6rger","orcid":"https://orcid.org/0000-0002-3064-147X"},"institutions":[{"id":"https://openalex.org/I22465464","display_name":"University of M\u00fcnster","ror":"https://ror.org/00pd74e08","country_code":"DE","type":"education","lineage":["https://openalex.org/I22465464"]}],"countries":["DE"],"is_corresponding":true,"raw_author_name":"Jens Lechtenb\u00f6rger","raw_affiliation_strings":["Department of Information Systems, University of M\u00fcnster, Leonardo-Campus 3, D-48149, M\u00fcnster, Germany","Department of Information Systems, University of M\u00fcnster, Leonardo-Campus 3, D-48149 M\u00fcnster, Germany. lechten@helios.uni-muenster.de"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Information Systems, University of M\u00fcnster, Leonardo-Campus 3, D-48149, M\u00fcnster, Germany","institution_ids":["https://openalex.org/I22465464"]},{"raw_affiliation_string":"Department of Information Systems, University of M\u00fcnster, Leonardo-Campus 3, D-48149 M\u00fcnster, Germany. lechten@helios.uni-muenster.de","institution_ids":["https://openalex.org/I22465464"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5054347138","display_name":"Hua Shu","orcid":"https://orcid.org/0000-0001-7694-564X"},"institutions":[{"id":"https://openalex.org/I1341412227","display_name":"IBM (United States)","ror":"https://ror.org/05hh8d621","country_code":"US","type":"company","lineage":["https://openalex.org/I1341412227"]},{"id":"https://openalex.org/I4210148712","display_name":"Silicon Valley University","ror":"https://ror.org/04jk6hn97","country_code":"US","type":"education","lineage":["https://openalex.org/I4210148712"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Hua Shu","raw_affiliation_strings":["IBM Silicon Valley Lab, 555 Bailey Avenue, San Jose, CA 95141, USA","IBM Silicon Valley Lab, 555 Bailey Avenue, San Jose, CA 95141, USA. huashu@us.ibm.com"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"IBM Silicon Valley Lab, 555 Bailey Avenue, San Jose, CA 95141, USA","institution_ids":["https://openalex.org/I4210148712"]},{"raw_affiliation_string":"IBM Silicon Valley Lab, 555 Bailey Avenue, San Jose, CA 95141, USA. huashu@us.ibm.com","institution_ids":["https://openalex.org/I1341412227"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5083197733","display_name":"Gottfried Vossen","orcid":null},"institutions":[{"id":"https://openalex.org/I22465464","display_name":"University of M\u00fcnster","ror":"https://ror.org/00pd74e08","country_code":"DE","type":"education","lineage":["https://openalex.org/I22465464"]}],"countries":["DE"],"is_corresponding":false,"raw_author_name":"Gottfried Vossen","raw_affiliation_strings":["Department of Information Systems, University of M\u00fcnster, Leonardo-Campus 3, D-48149, M\u00fcnster, Germany","Department of Information Systems, University of M\u00fcnster, Leonardo-Campus 3, D-48149 M\u00fcnster, Germany. vossen@helios.uni-muenster.de#TAB#"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Information Systems, University of M\u00fcnster, Leonardo-Campus 3, D-48149, M\u00fcnster, Germany","institution_ids":["https://openalex.org/I22465464"]},{"raw_affiliation_string":"Department of Information Systems, University of M\u00fcnster, Leonardo-Campus 3, D-48149 M\u00fcnster, Germany. vossen@helios.uni-muenster.de#TAB#","institution_ids":["https://openalex.org/I22465464"]}]}],"institutions":[],"countries_distinct_count":2,"institutions_distinct_count":3,"corresponding_author_ids":["https://openalex.org/A5022059310"],"corresponding_institution_ids":["https://openalex.org/I22465464"],"apc_list":{"value":2490,"currency":"EUR","value_usd":3090},"apc_paid":null,"fwci":0.5786,"has_fulltext":false,"cited_by_count":20,"citation_normalized_percentile":{"value":0.59744771,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":90,"max":96},"biblio":{"volume":"19","issue":"3","first_page":"343","last_page":"362"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T11106","display_name":"Data Management and Algorithms","score":0.9997000098228455,"subfield":{"id":"https://openalex.org/subfields/1711","display_name":"Signal Processing"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},"topics":[{"id":"https://openalex.org/T11106","display_name":"Data Management and Algorithms","score":0.9997000098228455,"subfield":{"id":"https://openalex.org/subfields/1711","display_name":"Signal Processing"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10317","display_name":"Advanced Database Systems and Queries","score":0.9993000030517578,"subfield":{"id":"https://openalex.org/subfields/1705","display_name":"Computer Networks and Communications"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T11063","display_name":"Rough Sets and Fuzzy Logic","score":0.9909999966621399,"subfield":{"id":"https://openalex.org/subfields/1703","display_name":"Computational Theory and Mathematics"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/aggregate","display_name":"Aggregate (composite)","score":0.7440494894981384},{"id":"https://openalex.org/keywords/table","display_name":"Table (database)","score":0.7372453808784485},{"id":"https://openalex.org/keywords/tuple","display_name":"Tuple","score":0.7118389010429382},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.7092199325561523},{"id":"https://openalex.org/keywords/column","display_name":"Column (typography)","score":0.6070393323898315},{"id":"https://openalex.org/keywords/representation","display_name":"Representation (politics)","score":0.5540649890899658},{"id":"https://openalex.org/keywords/property","display_name":"Property (philosophy)","score":0.4851284921169281},{"id":"https://openalex.org/keywords/theoretical-computer-science","display_name":"Theoretical computer science","score":0.3383053243160248},{"id":"https://openalex.org/keywords/algorithm","display_name":"Algorithm","score":0.3204987049102783},{"id":"https://openalex.org/keywords/mathematics","display_name":"Mathematics","score":0.2776625156402588},{"id":"https://openalex.org/keywords/data-mining","display_name":"Data mining","score":0.2653926908969879},{"id":"https://openalex.org/keywords/discrete-mathematics","display_name":"Discrete mathematics","score":0.22453546524047852}],"concepts":[{"id":"https://openalex.org/C4679612","wikidata":"https://www.wikidata.org/wiki/Q866298","display_name":"Aggregate (composite)","level":2,"score":0.7440494894981384},{"id":"https://openalex.org/C45235069","wikidata":"https://www.wikidata.org/wiki/Q278425","display_name":"Table (database)","level":2,"score":0.7372453808784485},{"id":"https://openalex.org/C118930307","wikidata":"https://www.wikidata.org/wiki/Q600590","display_name":"Tuple","level":2,"score":0.7118389010429382},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.7092199325561523},{"id":"https://openalex.org/C2780551164","wikidata":"https://www.wikidata.org/wiki/Q2306599","display_name":"Column (typography)","level":3,"score":0.6070393323898315},{"id":"https://openalex.org/C2776359362","wikidata":"https://www.wikidata.org/wiki/Q2145286","display_name":"Representation (politics)","level":3,"score":0.5540649890899658},{"id":"https://openalex.org/C189950617","wikidata":"https://www.wikidata.org/wiki/Q937228","display_name":"Property (philosophy)","level":2,"score":0.4851284921169281},{"id":"https://openalex.org/C80444323","wikidata":"https://www.wikidata.org/wiki/Q2878974","display_name":"Theoretical computer science","level":1,"score":0.3383053243160248},{"id":"https://openalex.org/C11413529","wikidata":"https://www.wikidata.org/wiki/Q8366","display_name":"Algorithm","level":1,"score":0.3204987049102783},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.2776625156402588},{"id":"https://openalex.org/C124101348","wikidata":"https://www.wikidata.org/wiki/Q172491","display_name":"Data mining","level":1,"score":0.2653926908969879},{"id":"https://openalex.org/C118615104","wikidata":"https://www.wikidata.org/wiki/Q121416","display_name":"Discrete mathematics","level":1,"score":0.22453546524047852},{"id":"https://openalex.org/C76155785","wikidata":"https://www.wikidata.org/wiki/Q418","display_name":"Telecommunications","level":1,"score":0.0},{"id":"https://openalex.org/C199539241","wikidata":"https://www.wikidata.org/wiki/Q7748","display_name":"Law","level":1,"score":0.0},{"id":"https://openalex.org/C17744445","wikidata":"https://www.wikidata.org/wiki/Q36442","display_name":"Political science","level":0,"score":0.0},{"id":"https://openalex.org/C111472728","wikidata":"https://www.wikidata.org/wiki/Q9471","display_name":"Epistemology","level":1,"score":0.0},{"id":"https://openalex.org/C94625758","wikidata":"https://www.wikidata.org/wiki/Q7163","display_name":"Politics","level":2,"score":0.0},{"id":"https://openalex.org/C126042441","wikidata":"https://www.wikidata.org/wiki/Q1324888","display_name":"Frame (networking)","level":2,"score":0.0},{"id":"https://openalex.org/C192562407","wikidata":"https://www.wikidata.org/wiki/Q228736","display_name":"Materials science","level":0,"score":0.0},{"id":"https://openalex.org/C138885662","wikidata":"https://www.wikidata.org/wiki/Q5891","display_name":"Philosophy","level":0,"score":0.0},{"id":"https://openalex.org/C159985019","wikidata":"https://www.wikidata.org/wiki/Q181790","display_name":"Composite material","level":1,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1023/a:1020197923385","is_oa":false,"landing_page_url":"https://doi.org/10.1023/a:1020197923385","pdf_url":null,"source":{"id":"https://openalex.org/S36033921","display_name":"Journal of Intelligent Information Systems","issn_l":"0925-9902","issn":["0925-9902","1573-7675"],"is_oa":false,"is_in_doaj":false,"is_core":true,"host_organization":"https://openalex.org/P4310319900","host_organization_name":"Springer Science+Business Media","host_organization_lineage":["https://openalex.org/P4310319900","https://openalex.org/P4310319965"],"host_organization_lineage_names":["Springer Science+Business Media","Springer Nature"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Journal of Intelligent Information Systems","raw_type":"journal-article"}],"best_oa_location":null,"sustainable_development_goals":[],"awards":[],"funders":[],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":18,"referenced_works":["https://openalex.org/W1488870204","https://openalex.org/W1558832481","https://openalex.org/W1586642582","https://openalex.org/W1943411325","https://openalex.org/W1990391007","https://openalex.org/W2012670464","https://openalex.org/W2023757326","https://openalex.org/W2086742729","https://openalex.org/W2103201239","https://openalex.org/W2103914162","https://openalex.org/W2109464129","https://openalex.org/W2115523108","https://openalex.org/W2142864156","https://openalex.org/W2160825121","https://openalex.org/W2950416404","https://openalex.org/W6633513001","https://openalex.org/W6653437496","https://openalex.org/W6677317372"],"related_works":["https://openalex.org/W4245395944","https://openalex.org/W2143551613","https://openalex.org/W1979740464","https://openalex.org/W2143345456","https://openalex.org/W2138823233","https://openalex.org/W2023236823","https://openalex.org/W3123448197","https://openalex.org/W2136814519","https://openalex.org/W2154338319","https://openalex.org/W1510114644"],"abstract_inverted_index":null,"counts_by_year":[{"year":2023,"cited_by_count":1},{"year":2021,"cited_by_count":2},{"year":2013,"cited_by_count":1},{"year":2012,"cited_by_count":2}],"updated_date":"2026-06-19T15:47:20.252518","created_date":"2016-06-24T00:00:00"}