{"id":"https://openalex.org/W1967999304","doi":"https://doi.org/10.1145/1142351.1142362","title":"Equivalence of queries combining set and bag-set semantics","display_name":"Equivalence of queries combining set and bag-set semantics","publication_year":2006,"publication_date":"2006-06-26","ids":{"openalex":"https://openalex.org/W1967999304","doi":"https://doi.org/10.1145/1142351.1142362","mag":"1967999304"},"language":"en","primary_location":{"id":"doi:10.1145/1142351.1142362","is_oa":false,"landing_page_url":"https://doi.org/10.1145/1142351.1142362","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Proceedings of the twenty-fifth ACM SIGMOD-SIGACT-SIGART symposium on Principles of database systems","raw_type":"proceedings-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/A5006348713","display_name":"Sara Cohen","orcid":"https://orcid.org/0000-0002-8482-9435"},"institutions":[{"id":"https://openalex.org/I174306211","display_name":"Technion \u2013 Israel Institute of Technology","ror":"https://ror.org/03qryx823","country_code":"IL","type":"education","lineage":["https://openalex.org/I174306211"]}],"countries":["IL"],"is_corresponding":true,"raw_author_name":"Sara Cohen","raw_affiliation_strings":["Technion---Israel Institute of Technology, Haifa, Israel"],"affiliations":[{"raw_affiliation_string":"Technion---Israel Institute of Technology, Haifa, Israel","institution_ids":["https://openalex.org/I174306211"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":1,"corresponding_author_ids":["https://openalex.org/A5006348713"],"corresponding_institution_ids":["https://openalex.org/I174306211"],"apc_list":null,"apc_paid":null,"fwci":2.4143,"has_fulltext":false,"cited_by_count":31,"citation_normalized_percentile":{"value":0.89513069,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":89,"max":98},"biblio":{"volume":null,"issue":null,"first_page":"70","last_page":"79"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10317","display_name":"Advanced Database Systems and Queries","score":0.9994999766349792,"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"}},"topics":[{"id":"https://openalex.org/T10317","display_name":"Advanced Database Systems and Queries","score":0.9994999766349792,"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/T10215","display_name":"Semantic Web and Ontologies","score":0.9993000030517578,"subfield":{"id":"https://openalex.org/subfields/1702","display_name":"Artificial Intelligence"},"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/T11106","display_name":"Data Management and Algorithms","score":0.9991999864578247,"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"}}],"keywords":[{"id":"https://openalex.org/keywords/equivalence","display_name":"Equivalence (formal languages)","score":0.7265004515647888},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.7090232372283936},{"id":"https://openalex.org/keywords/set","display_name":"Set (abstract data type)","score":0.5976280570030212},{"id":"https://openalex.org/keywords/semantics","display_name":"Semantics (computer science)","score":0.5554481744766235},{"id":"https://openalex.org/keywords/theoretical-computer-science","display_name":"Theoretical computer science","score":0.43276137113571167},{"id":"https://openalex.org/keywords/information-retrieval","display_name":"Information retrieval","score":0.3713757395744324},{"id":"https://openalex.org/keywords/programming-language","display_name":"Programming language","score":0.2828958034515381},{"id":"https://openalex.org/keywords/mathematics","display_name":"Mathematics","score":0.262891948223114},{"id":"https://openalex.org/keywords/discrete-mathematics","display_name":"Discrete mathematics","score":0.1817840337753296}],"concepts":[{"id":"https://openalex.org/C2780069185","wikidata":"https://www.wikidata.org/wiki/Q7977945","display_name":"Equivalence (formal languages)","level":2,"score":0.7265004515647888},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.7090232372283936},{"id":"https://openalex.org/C177264268","wikidata":"https://www.wikidata.org/wiki/Q1514741","display_name":"Set (abstract data type)","level":2,"score":0.5976280570030212},{"id":"https://openalex.org/C184337299","wikidata":"https://www.wikidata.org/wiki/Q1437428","display_name":"Semantics (computer science)","level":2,"score":0.5554481744766235},{"id":"https://openalex.org/C80444323","wikidata":"https://www.wikidata.org/wiki/Q2878974","display_name":"Theoretical computer science","level":1,"score":0.43276137113571167},{"id":"https://openalex.org/C23123220","wikidata":"https://www.wikidata.org/wiki/Q816826","display_name":"Information retrieval","level":1,"score":0.3713757395744324},{"id":"https://openalex.org/C199360897","wikidata":"https://www.wikidata.org/wiki/Q9143","display_name":"Programming language","level":1,"score":0.2828958034515381},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.262891948223114},{"id":"https://openalex.org/C118615104","wikidata":"https://www.wikidata.org/wiki/Q121416","display_name":"Discrete mathematics","level":1,"score":0.1817840337753296}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1145/1142351.1142362","is_oa":false,"landing_page_url":"https://doi.org/10.1145/1142351.1142362","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Proceedings of the twenty-fifth ACM SIGMOD-SIGACT-SIGART symposium on Principles of database systems","raw_type":"proceedings-article"}],"best_oa_location":null,"sustainable_development_goals":[],"awards":[],"funders":[],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":29,"referenced_works":["https://openalex.org/W75015137","https://openalex.org/W144096106","https://openalex.org/W150943429","https://openalex.org/W173390059","https://openalex.org/W1561908196","https://openalex.org/W1967992696","https://openalex.org/W1969991082","https://openalex.org/W1979514837","https://openalex.org/W1982556167","https://openalex.org/W1992681763","https://openalex.org/W1992810975","https://openalex.org/W2013136702","https://openalex.org/W2025731090","https://openalex.org/W2028864278","https://openalex.org/W2048531653","https://openalex.org/W2055586952","https://openalex.org/W2056660085","https://openalex.org/W2075035440","https://openalex.org/W2077261730","https://openalex.org/W2079590017","https://openalex.org/W2086316704","https://openalex.org/W2090337980","https://openalex.org/W2091243508","https://openalex.org/W2108930340","https://openalex.org/W2114883263","https://openalex.org/W2134483537","https://openalex.org/W2156717879","https://openalex.org/W2163491591","https://openalex.org/W2616339659"],"related_works":["https://openalex.org/W4287830728","https://openalex.org/W3097860111","https://openalex.org/W3123455607","https://openalex.org/W2138137818","https://openalex.org/W2460944165","https://openalex.org/W2077582506","https://openalex.org/W2375033689","https://openalex.org/W3007358821","https://openalex.org/W2007189270","https://openalex.org/W2991618286"],"abstract_inverted_index":{"The":[0,83],"query":[1,29,76],"equivalence":[2,84,98,113],"problem":[3,85],"has":[4],"been":[5],"studied":[6],"extensively":[7],"for":[8,13,86,97,112],"set-semantics":[9],"and,":[10],"more":[11],"recently,":[12],"bag-set":[14,23,81],"semantics.":[15,24,82],"However,":[16],"SQL":[17,28,52],"queries":[18,87,107],"often":[19],"combine":[20],"set":[21,45,65,79],"and":[22,80,109],"For":[25,101],"example,":[26,50],"an":[27],"that":[30,42],"returns":[31,43,63],"a":[32,38,44,56,64],"multiset":[33],"of":[34,46,58,61,66,106],"elements":[35],"may":[36],"call":[37],"subquery":[39],"or":[40],"view":[41],"elements.":[47],"As":[48],"another":[49],"in":[51],"one":[53],"can":[54],"compute":[55],"multiset-union":[57],"queries,":[59],"each":[60],"which":[62,73],"answers.":[67],"This":[68],"paper":[69],"presents":[70],"combined":[71,90],"semantics,":[72],"formally":[74],"models":[75],"evaluation":[77],"combining":[78],"evaluated":[88],"under":[89],"semantics":[91],"is":[92,99],"studied.":[93],"A":[94],"sufficient":[95,110],"condition":[96],"presented.":[100,115],"several":[102],"important":[103],"common":[104],"classes":[105],"necessary":[108],"conditions":[111],"are":[114]},"counts_by_year":[{"year":2024,"cited_by_count":1},{"year":2023,"cited_by_count":1},{"year":2020,"cited_by_count":2},{"year":2019,"cited_by_count":4},{"year":2018,"cited_by_count":1},{"year":2017,"cited_by_count":2},{"year":2016,"cited_by_count":2},{"year":2015,"cited_by_count":1},{"year":2013,"cited_by_count":2},{"year":2012,"cited_by_count":3}],"updated_date":"2025-11-06T03:46:38.306776","created_date":"2025-10-10T00:00:00"}