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- Relational_algebra abstract "In Data Management, relational algebra describes the how data is naturally organized into sets of data, aptly so as data is the documentation of a real life person, place or thing and the events or transactions between them at a point in time. Relational algebra, first described by E.F. Codd while at IBM, is a family of algebra with a well-founded semantics used for modelling the data stored in relational databases, and defining queries on it. To organize the data, first the redundant data and repeating groups of data are removed, which we call normalized. By doing this the data is organized or normalized into what is called first normal form (1NF). Typically a logical data model documents and standardizes the relationships between data entities (with its elements). A primary key uniquely identifies an instance of an entity, also known as a record. Once the data is normalized and in sets of data (entities and tables), the main operations of the relational algebra can be performed which are the set operations (such as union, intersection, and cartesian product), selection (keeping only some lines of a table) and the projection (keeping only some columns). Set operations are performed in the where statement in SQL, which is where one set of data is related to another set of data. The main application of relational algebra is providing a theoretical foundation for relational databases, particularly query languages for such databases, chief among which is SQL.".
- Relational_algebra wikiPageExternalLink bandicoot-algebra.pdf.
- Relational_algebra wikiPageExternalLink relational.
- Relational_algebra wikiPageExternalLink leap.sourceforge.net.
- Relational_algebra wikiPageExternalLink ioannidis.pdf.
- Relational_algebra wikiPageExternalLink RADownload.
- Relational_algebra wikiPageExternalLink index.html.
- Relational_algebra wikiPageExternalLink rat.html.
- Relational_algebra wikiPageID "175285".
- Relational_algebra wikiPageRevisionID "603628483".
- Relational_algebra hasPhotoCollection Relational_algebra.
- Relational_algebra subject Category:Relational_model.
- Relational_algebra comment "In Data Management, relational algebra describes the how data is naturally organized into sets of data, aptly so as data is the documentation of a real life person, place or thing and the events or transactions between them at a point in time. Relational algebra, first described by E.F. Codd while at IBM, is a family of algebra with a well-founded semantics used for modelling the data stored in relational databases, and defining queries on it.".
- Relational_algebra label "Algebra relazionale".
- Relational_algebra label "Algèbre relationnelle".
- Relational_algebra label "Rachunek relacyjny".
- Relational_algebra label "Relational algebra".
- Relational_algebra label "Relationale Algebra".
- Relational_algebra label "Relationele algebra".
- Relational_algebra label "Álgebra relacional".
- Relational_algebra label "Álgebra relacional".
- Relational_algebra label "Реляционная алгебра".
- Relational_algebra label "关系代数 (数据库)".
- Relational_algebra label "関係代数 (関係モデル)".
- Relational_algebra sameAs Relationale_Algebra.
- Relational_algebra sameAs Álgebra_relacional.
- Relational_algebra sameAs Algèbre_relationnelle.
- Relational_algebra sameAs Aljabar_relasional.
- Relational_algebra sameAs Algebra_relazionale.
- Relational_algebra sameAs 関係代数_(関係モデル).
- Relational_algebra sameAs 관계대수.
- Relational_algebra sameAs Relationele_algebra.
- Relational_algebra sameAs Rachunek_relacyjny.
- Relational_algebra sameAs Álgebra_relacional.
- Relational_algebra sameAs m.017pzb.
- Relational_algebra sameAs Q840540.
- Relational_algebra sameAs Q840540.
- Relational_algebra wasDerivedFrom Relational_algebra?oldid=603628483.
- Relational_algebra isPrimaryTopicOf Relational_algebra.