EntityQ840540· pop 31· linked from 186 articlesrelational algebraSign in to savefamily of algebras used for modelling the data stored in relational databases, and defining queries on itConnectionsrelational databaseEntityunionEntitycomplementEntityEdgar F. CoddEntityunary operationEntityquery optimizationEntitymulti-model database systemEntityInternational Standard Book NumberEntityset theoryEntityUnicodeEntitysetEntitydatabaseEntityQ47607Entitydigital object identifierEntityInternational Standard Serial NumberEntityCharles Sanders PeirceEntityOCLC, Inc.Entitycommutative propertyEntityCartesian productEntitybinary operationEntityCategoriesDatabase management systemsRelational algebraRelational model