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Databases: Difference between revisions
moved content from SPARQL and fixed the headings once again
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'''Known types of databases''' | '''Known types of databases''' | ||
* [[w:Relational database|Relational database]] provided by a [[w:RDBMS|RDBMS]] and queried with [[w:SQL|SQL]]. Track-proven technology. | * [[w:Relational database|Relational database]] provided by a [[w:RDBMS|RDBMS]] and queried with [[w:SQL|SQL]]. Track-proven technology. | ||
* Subject-predicate-object database are provided by [[w:graph databases|graph databases]], specialized native [[w:Triplestore|triplestore]]s and piggy-packing solutions that use an RDBMS to store and query the triplets and the networks they compose. | * [[w:NoSQL]] variates: | ||
* [[w:Graph databases|Graph databases]] would intuitively appear more advanced than using RDF-triplet composed semantic networks but are not much different on the outside. Both jump through the same hoops but with different efficiency and grace. | ** Subject-predicate-object database are provided by [[w:graph databases|graph databases]], specialized native [[w:Triplestore|triplestore]]s and piggy-packing solutions that use an RDBMS to store and query the triplets and the networks they compose. | ||
* [[w:Object database|Object database]]s are old but on the rise with | ** [[w:Graph databases|Graph databases]] would intuitively appear more advanced than using RDF-triplet composed semantic networks but are not much different on the outside. Both jump through the same hoops but with different efficiency and grace. | ||
** [[w:Object database|Object database]]s are old but on the rise with NoSQL-based thinking and the modern needs, like leanness, real-time need and scaleability for which the other solutions might be too limiting. | |||
== Relational database == | == Relational database == | ||
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* [[w:PostgreSQL]] powering the https://media.consumium.org [[w:GNU MediaGoblin]] | * [[w:PostgreSQL]] powering the https://media.consumium.org [[w:GNU MediaGoblin]] | ||
== Subject-predicate-object database == | == NoSQL databases == | ||
{{Q|A '''NoSQL''' (originally referring to "non SQL" or "non relational") database provides a mechanism for storage and retrieval of data which is modeled in means other than the tabular relations used in relational databases.|Wikipedia|[[w:NoSQL|NoSQL]]}} | |||
All the following database types can be considered variations of NoSQL. | |||
=== Subject-predicate-object database === | |||
Subject-predicate-object databases basically construct [[w:semantic]] networks from interlinked atomic units called a [[w:triplet]] so they are not fundamentally different from graph databases in functionality and utility offered. | Subject-predicate-object databases basically construct [[w:semantic]] networks from interlinked atomic units called a [[w:triplet]] so they are not fundamentally different from graph databases in functionality and utility offered. | ||
These networks may be queried with a suitable query language such as [[w:SPARQL]] which in practice allows you to compose semantic queries. | These networks may be queried with a suitable query language such as [[w:SPARQL]] which in practice allows you to compose semantic queries. | ||
=== Relevant subject-predicate-object database powered systems to interoperate with === | {{Q|'''SPARQL''' is a [[w:recursive acronym|recursive acronym]] and stands for '''SPARQL Protocol and RDF Query Language'''). It is an [[w:RDF query language|RDF query language]], that is, a [[w:Semantic_Query|semantic]] [[w:query language|query language]] for [[w:database|database]]s, able to retrieve and manipulate data stored in [[w:Resource Description Framework|Resource Description Framework (RDF)]] format.|Wikipedia|[[w:SPARQL|SPARQL]]}} | ||
{{Q|A '''triplestore''' or '''RDF store''' is a purpose-built [[w:database|database]] for the storage and retrieval of [[w:Resource Description Framework#Overview|triples]] through [[w:Semantic Query|semantic queries]].|Wikipedia|[[w:Triplestore]]}} | |||
==== Relevant subject-predicate-object database powered systems to interoperate with ==== | |||
* [[Semantic MediaWiki]] | * [[Semantic MediaWiki]] | ||
* [[DBpedia]] | * [[DBpedia]] | ||
* [[Wikidata]] | * [[Wikidata]] | ||
=== Things to consider in selection of triplestore === | ==== Things to consider in selection of triplestore ==== | ||
{{Q|Some '''subject-predicate-object databases''' (also known as ''[[w:triplestore|triplestore]]s'') have been built as database engines from scratch, while others have been built on top of existing commercial relational database engines (e.g., SQL-based).|Wikipedia|[[w:list of subject-predicate-object databases|list of subject-predicate-object databases]]}} | |||
A [[w:triplestore]] maybe a native implementation from ground up or be standing on the shoulders of a standard RDBMS system where actual [[w:SQL]] is formulated by the interpreter and then queried from SQL. This probably has upsides and downsides. | A [[w:triplestore]] maybe a native implementation from ground up or be standing on the shoulders of a standard RDBMS system where actual [[w:SQL]] is formulated by the interpreter and then queried from SQL. This probably has upsides and downsides. | ||
=== Lists and comparisons of subject-predicate-object databases and SPARQL implementations === | ==== Lists and comparisons of subject-predicate-object databases and SPARQL implementations ==== | ||
* [[w:List of subject-predicate-object databases|Wikipedia's list of subject-predicate-object databases]] | * [[w:List of subject-predicate-object databases|Wikipedia's list of subject-predicate-object databases]] | ||
* [[w:List of SPARQL implementations|Wikipedia's list of SPARQL implementations]] | * [[w:List of SPARQL implementations|Wikipedia's list of SPARQL implementations]] | ||
== Graph database == | === Graph database === | ||
A [[w:graph database|graph database]] stores and queries [[w:Graph (abstract data type)|graphs]] which can be stored in and constructed from RDF triplets so they are quite alike and overlapping in functionality offered but the query performance varies (see talk page for more). | A [[w:graph database|graph database]] stores and queries [[w:Graph (abstract data type)|graphs]] which can be stored in and constructed from RDF triplets so they are quite alike and overlapping in functionality offered but the query performance varies (see talk page for more). | ||
* [[w:Graph_database#List_of_graph_databases|Wikipedia's list of graph databases]] | * [[w:Graph_database#List_of_graph_databases|Wikipedia's list of graph databases]] | ||
== Object database == | === Object database === | ||
* [[w:Object_database#Timeline|Wikipedia's chronological list of object databases]] | * [[w:Object_database#Timeline|Wikipedia's chronological list of object databases]] | ||