About: SQLf

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SQLf is a SQL extended with fuzzy set theory application for expressing flexible (fuzzy) queries to traditional (or ″Regular″) Relational Databases. Among the known extensions proposed to SQL, at the present time, this is the most complete, because it allows the use of diverse fuzzy elements in all the constructions of the language SQL.

Attributes	Values
rdfs:label	SQLf (en)
rdfs:comment	SQLf is a SQL extended with fuzzy set theory application for expressing flexible (fuzzy) queries to traditional (or ″Regular″) Relational Databases. Among the known extensions proposed to SQL, at the present time, this is the most complete, because it allows the use of diverse fuzzy elements in all the constructions of the language SQL. (en)
dcterms:subject	Data modeling languages Declarative programming languages Query languages SQL Fuzzy logic Relational database management systems Non-classical logic
Wikipage page ID	46948278 (xsd:integer)
Wikipage revision ID	1119831009 (xsd:integer)
Link from a Wikipage to another Wikipage	Cartesian product Relational algebra Data modeling languages Declarative programming languages Query languages SQL SQL Fuzzy logic Fuzzy logic Fuzzy set Relational database management systems Non-classical logic Projection (relational algebra) Selection (relational algebra)
sameAs	SQLf SQLf SQLf SQLf
dbp:wikiPageUsesTemplate	dbt:Science_and_technology_studies dbt:Math dbt:Query_languages dbt:Reflist dbt:Databases dbt:Non-classical_logic dbt:SQL
has abstract	SQLf is a SQL extended with fuzzy set theory application for expressing flexible (fuzzy) queries to traditional (or ″Regular″) Relational Databases. Among the known extensions proposed to SQL, at the present time, this is the most complete, because it allows the use of diverse fuzzy elements in all the constructions of the language SQL. SQLf is the only known proposal of flexible query system allowing linguistic quantification over set of rows in queries, achieved through the extension of SQL nesting and partitioning structures with fuzzy quantifiers. It also allows the use of quantifiers to qualify the quantity of search criteria satisfied by single rows. Several mechanisms are proposed for query evaluation, the most important being the one based on the derivation principle. This consists in deriving classic queries that produce, given a threshold t, a t-cut of the result of the fuzzy query, so that the additional processing cost of using a fuzzy language is diminished. (en)
gold:hypernym	SQL
prov:wasDerivedFrom	wikipedia-en:SQLf?oldid=1119831009&ns=0
page length (characters) of wiki page	4964 (xsd:nonNegativeInteger)
foaf:isPrimaryTopicOf	wikipedia-en:SQLf
is Link from a Wikipage to another Wikipage of	Fuzzy logic
is foaf:primaryTopic of	wikipedia-en:SQLf

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