🌐EnglishEnglishBahasa IndonesiaDeutschEspañolFrançaisItalianoNederlandsPolskiPortuguêsSvenskaTiếng ViệtTürkçeРусскийالعربيةفارسی한국어中文日本語EntityQ840540· pop 31· linked from 186 articlesrelational algebrafamily of algebras used for modelling the data stored in relational databases, and defining queries on itAvailable in 30 languagesEspañolFrançaisDeutsch中文日本語РусскийPortuguêsItalianoالعربيةAlbanianConnectionsrelational databaseEntityunionEntityCategoriesDatabase management systemsRelational algebraRelational model