Matches in DBpedia 2016-04 for { <http://dbpedia.org/resource/View_(SQL)> ?p ?o }
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- View_(SQL) abstract "In database theory, a view is the result set of a stored query on the data, which the database users can query just as they would in a persistent database collection object. This pre-established query command is kept in the database dictionary. Unlike ordinary base tables in a relational database, a view does not form part of the physical schema: as a result set, it is a virtual table computed or collated dynamically from data in the database when access to that view is requested. Changes applied to the data in a relevant underlying table are reflected in the data shown in subsequent invocations of the view. In some NoSQL databases, views are the only way to query data.Views can provide advantages over tables: Views can represent a subset of the data contained in a table. Consequently, a view can limit the degree of exposure of the underlying tables to the outer world: a given user may have permission to query the view, while denied access to the rest of the base table. Views can join and simplify multiple tables into a single virtual table. Views can act as aggregated tables, where the database engine aggregates data (sum, average, etc.) and presents the calculated results as part of the data. Views can hide the complexity of data. For example, a view could appear as Sales2000 or Sales2001, transparently partitioning the actual underlying table. Views take very little space to store; the database contains only the definition of a view, not a copy of all the data that it presents. Depending on the SQL engine used, views can provide extra security.Just as a function (in programming) can provide abstraction, so can a database view. In another parallel with functions, database users can manipulate nested views, thus one view can aggregate data from other views. Without the use of views, the normalization of databases above second normal form would become much more difficult. Views can make it easier to create lossless join decomposition.Just as rows in a base table lack any defined ordering, rows available through a view do not appear with any default sorting. A view is a relational table, and the relational model defines a table as a set of rows. Since sets are not ordered — by definition — neither are the rows of a view. Therefore, an ORDER BY clause in the view definition is meaningless; the SQL standard (SQL:2003) does not allow an ORDER BY clause in the subquery of a CREATE VIEW command, just as it is refused in a CREATE TABLE statement. However, sorted data can be obtained from a view, in the same way as any other table — as part of a query statement on that view. Nevertheless, some DBMS (such as Oracle Database) do not abide by this SQL standard restriction.".
- View_(SQL) wikiPageExternalLink ms187956.aspx.
- View_(SQL) wikiPageExternalLink views.html.
- View_(SQL) wikiPageExternalLink CREATE+VIEW.
- View_(SQL) wikiPageExternalLink SQLRF01504.
- View_(SQL) wikiPageExternalLink SQLRF01302.
- View_(SQL) wikiPageExternalLink db2z_typesoftables.htm.
- View_(SQL) wikiPageExternalLink Introduction_to_CouchDB_views.
- View_(SQL) wikiPageExternalLink tutorial-views.html.
- View_(SQL) wikiPageExternalLink lang_createview.html.
- View_(SQL) wikiPageID "1960226".
- View_(SQL) wikiPageLength "7256".
- View_(SQL) wikiPageOutDegree "41".
- View_(SQL) wikiPageRevisionID "700392747".
- View_(SQL) wikiPageWikiLink Abstraction_(computer_science).
- View_(SQL) wikiPageWikiLink Average.
- View_(SQL) wikiPageWikiLink Bidirectionalization.
- View_(SQL) wikiPageWikiLink Category:Database_management_systems.
- View_(SQL) wikiPageWikiLink Category:Database_theory.
- View_(SQL) wikiPageWikiLink Category:SQL.
- View_(SQL) wikiPageWikiLink Data.
- View_(SQL) wikiPageWikiLink Data_warehouse.
- View_(SQL) wikiPageWikiLink Database.
- View_(SQL) wikiPageWikiLink Database_design.
- View_(SQL) wikiPageWikiLink Database_engine.
- View_(SQL) wikiPageWikiLink Database_normalization.
- View_(SQL) wikiPageWikiLink Database_theory.
- View_(SQL) wikiPageWikiLink Database_trigger.
- View_(SQL) wikiPageWikiLink Delete_(SQL).
- View_(SQL) wikiPageWikiLink File_system_permissions.
- View_(SQL) wikiPageWikiLink IBM_DB2.
- View_(SQL) wikiPageWikiLink Insert_(SQL).
- View_(SQL) wikiPageWikiLink Join_(SQL).
- View_(SQL) wikiPageWikiLink Materialized_view.
- View_(SQL) wikiPageWikiLink Microsoft_SQL_Server.
- View_(SQL) wikiPageWikiLink NoSQL.
- View_(SQL) wikiPageWikiLink Oracle_Database.
- View_(SQL) wikiPageWikiLink Order_by.
- View_(SQL) wikiPageWikiLink Partition_(database).
- View_(SQL) wikiPageWikiLink PostgreSQL.
- View_(SQL) wikiPageWikiLink Query_language.
- View_(SQL) wikiPageWikiLink Query_optimization.
- View_(SQL) wikiPageWikiLink Relational_database.
- View_(SQL) wikiPageWikiLink Result_set.
- View_(SQL) wikiPageWikiLink Row_(database).
- View_(SQL) wikiPageWikiLink SQL.
- View_(SQL) wikiPageWikiLink SQL:2003.
- View_(SQL) wikiPageWikiLink Second_normal_form.
- View_(SQL) wikiPageWikiLink Statement_(computer_science).
- View_(SQL) wikiPageWikiLink Subroutine.
- View_(SQL) wikiPageWikiLink Summation.
- View_(SQL) wikiPageWikiLink Update_(SQL).
- View_(SQL) wikiPageWikiLinkText "'''''View'''''".
- View_(SQL) wikiPageWikiLinkText "View (SQL)".
- View_(SQL) wikiPageWikiLinkText "database views".
- View_(SQL) wikiPageWikiLinkText "view".
- View_(SQL) wikiPageWikiLinkText "views".
- View_(SQL) wikiPageUsesTemplate Template:Databases.
- View_(SQL) subject Category:Database_management_systems.
- View_(SQL) subject Category:Database_theory.
- View_(SQL) subject Category:SQL.
- View_(SQL) hypernym Set.
- View_(SQL) type Area.
- View_(SQL) type Language.
- View_(SQL) type Area.
- View_(SQL) type Language.
- View_(SQL) comment "In database theory, a view is the result set of a stored query on the data, which the database users can query just as they would in a persistent database collection object. This pre-established query command is kept in the database dictionary. Unlike ordinary base tables in a relational database, a view does not form part of the physical schema: as a result set, it is a virtual table computed or collated dynamically from data in the database when access to that view is requested.".
- View_(SQL) label "View (SQL)".
- View_(SQL) sameAs Q1329910.
- View_(SQL) sameAs Pohled_(databáze).
- View_(SQL) sameAs Sicht_(Datenbank).
- View_(SQL) sameAs Vista_(base_de_datos).
- View_(SQL) sameAs دید_(پایگاه_داده).
- View_(SQL) sameAs Vue_(base_de_données).
- View_(SQL) sameAs Vista_(basi_di_dati).
- View_(SQL) sameAs ビュー_(データベース).
- View_(SQL) sameAs VIEW_(SQL).
- View_(SQL) sameAs Skats_(datubāze).
- View_(SQL) sameAs Visninger_(database).
- View_(SQL) sameAs Widok_(bazy_danych).
- View_(SQL) sameAs Visão_(banco_de_dados).
- View_(SQL) sameAs m.0693rp.
- View_(SQL) sameAs Представление_(базы_данных).
- View_(SQL) sameAs Pohľad_(databáza).
- View_(SQL) sameAs Розріз_даних.
- View_(SQL) sameAs Q1329910.
- View_(SQL) sameAs 视图.
- View_(SQL) wasDerivedFrom View_(SQL)?oldid=700392747.
- View_(SQL) isPrimaryTopicOf View_(SQL).