@prefix foaf: .
foaf:primaryTopic .
@prefix dbo: .
@prefix dbr: .
dbr:Three-valued_logic dbo:wikiPageWikiLink .
@prefix rdf: .
@prefix owl: .
rdf:type owl:Thing .
@prefix rdfs: .
rdfs:seeAlso dbr:Option_type ;
owl:sameAs ,
,
,
,
.
@prefix wikidata: .
owl:sameAs wikidata:Q371029 ,
,
,
,
,
,
,
,
,
;
rdfs:label "\u0642\u064A\u0645\u0629 \u0641\u0627\u0631\u063A\u0629 (\u0625\u0633 \u0643\u064A\u0648 \u0625\u0644)"@ar ,
"Null (SQL)"@pl ,
"Null (SQL)"@en ,
"NULL (SQL)"@ru ,
"Null (SQL)"@ko ,
"Null (SQL)"@uk ,
"\u7A7A\u503C (SQL)"@zh ,
"Null (SQL)"@pt ,
"Null (SQL)"@es ,
"Null (SQL)"@el .
@prefix dct: .
@prefix dbc: .
dct:subject dbc:Unknown_content ,
dbc:Articles_with_example_SQL_code ,
dbc:SQL_keywords ;
foaf:depiction ,
.
@prefix prov: .
prov:wasDerivedFrom .
@prefix gold: .
gold:hypernym dbr:Marker ;
foaf:isPrimaryTopicOf .
@prefix dbp: .
dbp:content "class=\"wikitable\" style=\"display: inline-table !important\"\n+ Emp\n\n! Name !! Age\n\n George 43\n\n Harriet \n\n Charles 56\n\n class=\"wikitable\" style=\"display: inline-table !important\"\n+ EmpH22\n\n! Name !! Age\n\n George 43\n\n Harriet 22\n\n Charles 56\n\n class=\"wikitable\" style=\"display: inline-table !important\"\n+ EmpH37\n\n! Name !! Age\n\n George 43\n\n Harriet 37\n\n Charles 56"@en .
@prefix ns12: .
dbo:wikiPageExternalLink ns12:databaserelation00date ,
,
,
,
,
,
,
,
,
,
,
;
dbo:thumbnail ;
dbp:caption "The Codd table Emp may represent the relation EmpH22 or EmpH37, as pictured."@en ;
dbp:align "center"@en ;
dbp:innerstyle "display: flex; flex-flow: row wrap; justify-content: space-evenly;"@en .
@prefix xsd: .
dbp:date "2016-03-05"^^xsd:date ,
"2013-04-12"^^xsd:date ;
dbp:url ,
;
dbo:wikiPageWikiLink dbr:Relational_model ,
dbr:Check_constraint ,
dbr:Result_set ,
dbr:IBM_System_R ,
dbr:RDBMS ,
dbr:Partial_equivalence_relation ,
,
dbr:ACM_Transactions_on_Database_Systems ,
,
dbr:Relational_algebra ,
dbr:Witold_Lipski ,
dbr:Function_overloading ,
dbr:Hugh_Darwen ,
dbr:Data_type ,
dbr:MySQL ,
dbr:SQL92 ,
dbr:Computerworld ,
,
,
dbr:List_of_SQL_reserved_words ,
dbr:Data_Definition_Language ,
dbr:Chris_Date ,
dbr:Semipredicate_problem ,
dbr:Fabian_Pascal ,
dbr:Constant_function ,
dbr:Data_manipulation_language ,
dbr:Boolean_type ,
dbr:SQLite ,
dbr:Database_schema ,
,
dbr:Natural_join ,
dbr:IAENG ,
dbr:Closed-world_assumption ,
dbr:Concatenation ,
dbr:Designated_value ,
dbr:Law_of_excluded_fourth ,
dbr:B-tree ,
dbc:Articles_with_example_SQL_code ,
dbr:False_dilemma ,
dbr:PostgreSQL ,
dbr:Microsoft_SQL_Server ,
dbr:SQL ,
dbr:Co-NP-complete ,
dbr:Foreign_key ,
dbr:Three-valued_logic ,
dbr:Aggregate_function ,
dbr:Propositional_logic ,
dbr:SQL-92 ,
dbr:Null_pointer .
@prefix ns14: .
dbo:wikiPageWikiLink ns14:Tasmania ,
,
dbr:Law_of_excluded_middle ,
dbr:Procedural_programming ,
dbr:Relational_database ,
dbr:Pearson_PLC ,
,
,
,
,
dbr:Association_for_Computing_Machinery ,
dbr:Functionally_complete ,
dbr:Possible_world ,
dbr:Skolem_function ,
dbr:Reverse_Polish_notation ,
dbr:Database_theory ,
dbc:SQL_keywords ,
,
dbr:Conditional_table ,
,
,
dbr:SIGMOD .
@prefix ns15: .
dbo:wikiPageWikiLink ns15:NULLs_and_the_Three_Valued_Logic ,
dbr:Telephone_number ,
,
dbr:Undefined_value ,
dbr:Open-world_assumption ,
dbr:Law_of_Identity ,
dbr:Database ,
dbr:Switch_statement ,
,
dbr:Is_functions ,
dbr:Don_Chamberlin ,
dbc:Unknown_content .
@prefix ns16: .
dbo:wikiPageWikiLink ns16:SQL ,
dbr:Omega ,
,
dbr:Data_Manipulation_Language ,
dbr:Ternary_logic ,
dbr:SQL_Server_Compact .
@prefix ns17: .
dbo:wikiPageWikiLink ns17:PSM ,
dbr:Transact-SQL ,
dbr:Data_domain ;
dbo:description "\u0639\u0644\u0627\u0645\u0629 \u062E\u0627\u0635\u0629 \u0648\u0643\u0644\u0645\u0629 \u0631\u0626\u064A\u0633\u064A\u0629 \u0641\u064A \u0623\u0633 \u0643\u064A\u0648 \u0625\u0644 (SQL)"@ar ,
"Schl\u00FCsselwort in SQL und Kennzeichnung f\u00FCr nicht vorhandene Datenwerten innerhalb einer Datenbank"@de ,
"SQL\u4E2D\u7684\u7279\u6B8A\u6807\u8BB0\u548C\u5173\u952E\u5B57"@zh ,
"special marker and keyword in SQL indicating that something has no value"@en ,
"\u03BB\u03AD\u03BE\u03B7 \u03BA\u03BB\u03B5\u03B9\u03B4\u03AF \u03C3\u03C4\u03B7\u03BD SQL"@el .
@prefix dbt: .
dbp:wikiPageUsesTemplate dbt:Webarchive ,
dbt:SQL ,
dbt:Mono ,
dbt:Citation_needed ,
dbt:Cite_book ,
dbt:Further ,
dbt:Quote ,
dbt:Null_result ,
dbt:No2 ,
dbt:Nulls ,
dbt:Redirect ,
,
dbt:Snd ,
dbt:Cite_journal ,
dbt:Portal ,
dbt:See_also ,
dbt:NULL ,
dbt:Nothing ,
dbt:Image_frame ,
dbt:Unknown ,
,
dbt:Mvar ,
dbt:Reflist ,
dbt:Overline ,
dbt:Short_description ,
dbt:Yes2 ,
,
,
dbt:Code ,
dbt:Anchor ,
,
.
dbr:SQL_syntax dbo:wikiPageWikiLink .
dbr:Relational_model dbo:wikiPageWikiLink .
dbr:Data_integrity dbo:wikiPageWikiLink .
dbr:Dataphor dbo:wikiPageWikiLink .
dbo:wikiPageWikiLink .
dbr:User-defined_function dbo:wikiPageWikiLink .
dbr:Nullable_type dbo:wikiPageWikiLink .
dbr:Suppliers_and_Parts_database dbo:wikiPageWikiLink .
dbr:Boolean_data_type dbo:wikiPageWikiLink .
dbr:Witold_Lipski dbo:wikiPageWikiLink .
dbr:Outline_of_databases dbo:wikiPageWikiLink .
dbr:Lifting dbo:wikiPageWikiLink .
dbr:Null_cipher dbo:wikiPageWikiLink .
dbr:Codd_table dbo:wikiPageWikiLink ;
dbo:wikiPageRedirects .
dbr:Codd_tables dbo:wikiPageWikiLink ;
dbo:wikiPageRedirects .
dbr:NULLIF dbo:wikiPageWikiLink ;
dbo:wikiPageRedirects .
dbo:wikiPageWikiLink ;
dbo:wikiPageRedirects .
dbr:NULL_marks dbo:wikiPageWikiLink ;
dbo:wikiPageRedirects .
dbr:NVL dbo:wikiPageWikiLink ;
dbo:wikiPageRedirects .
dbr:C-table dbo:wikiPageWikiLink ;
dbo:wikiPageRedirects .
dbo:wikiPageWikiLink ;
dbo:wikiPageRedirects .
dbr:Sql_case dbo:wikiPageWikiLink ;
dbo:wikiPageRedirects .
dbr:Sql_null dbo:wikiPageWikiLink ;
dbo:wikiPageRedirects .
dbo:wikiPageWikiLink .
dbr:Entity_integrity dbo:wikiPageWikiLink .
dbo:wikiPageWikiLink .
dbr:Omega dbo:wikiPageWikiLink .
dbr:Virtuoso_Universal_Server dbo:wikiPageWikiLink .
dbr:Check_constraint dbo:wikiPageWikiLink .
dbo:wikiPageWikiLink .
dbo:wikiPageWikiLink .
dbr:Shapefile dbo:wikiPageWikiLink .
dbr:Undefined_value dbo:wikiPageWikiLink .
dbr:Null dbo:wikiPageWikiLink ;
dbo:wikiPageDisambiguates .
dbr:Order_by dbo:wikiPageWikiLink .
dbo:wikiPageWikiLink .
dbr:Database_normalization dbo:wikiPageWikiLink .
dbr:David_McGoveran dbo:wikiPageWikiLink .
dbr:First_normal_form dbo:wikiPageWikiLink .
dbr:Data_domain dbo:wikiPageWikiLink .
dbr:Uncertain_database dbo:wikiPageWikiLink ;
dbo:wikiPageRedirects .
dbr:Is_functions dbo:wikiPageWikiLink .
dbo:wikiPageWikiLink .
dbr:Foreign_key dbo:wikiPageWikiLink .
dbr:SQL dbo:wikiPageWikiLink .
dbr:Microsoft_SQL_Server dbo:wikiPageWikiLink .
dbo:wikiPageWikiLink .
dbo:wikiPageWikiLink .
ns16:SQL dbo:wikiPageWikiLink .
dbr:Relational_algebra dbo:wikiPageWikiLink .
dbo:wikiPageWikiLink .
dbr:Null_symbol dbo:wikiPageWikiLink .
dbo:wikiPageWikiLink .
dbr:SQL_CASE dbo:wikiPageWikiLink ;
dbo:wikiPageRedirects .
dbr:Propagation_constraint dbo:wikiPageWikiLink .
dbr:COALESCE dbo:wikiPageWikiLink ;
dbo:wikiPageRedirects .