Rel — may mean: *Rel, the category of sets and relations *Rel (DBMS), a database management system *rel, an HTML attribute for indicating a semantic link *REL, a file format generated by Microsoft s M80 and Digital Research s RMAC for CP/M *Recommended … Wikipedia
Database management system — A database management system (DBMS) is a software package with computer programs that control the creation, maintenance, and the use of a database. It allows organizations to conveniently develop databases for various applications by database… … Wikipedia
Ingres (database) — Ingres Ingres Corporation logo Developer(s) Actian Corporation Stable release Ingres Database 10 / October 12, 2010; 13 months ago (2010 10 12) … Wikipedia
Relational model — The relational model for database management is a database model based on first order predicate logic, first formulated and proposed in 1969 by Edgar Codd. [ Derivability, Redundancy, and Consistency of Relations Stored in Large Data Banks , E.F … Wikipedia
List of relational database management systems — See DBMS for a shorter list of “typical”, representative database management systems.Current software*4th Dimension *Adabas D *Alpha Five *Apache Derby *CA Datacom *CSQL *Daffodil database *Dataphor *DB2 *Derby aka Java DB *EnterpriseDB… … Wikipedia
Relational algebra — Not to be confused with Relation algebra. Relational algebra, an offshoot of first order logic (and of algebra of sets), deals with a set of finitary relations (see also relation (database)) that is closed under certain operators. These operators … Wikipedia
The Third Manifesto — (1995) is Christopher J. Date s and Hugh Darwen s proposal for future relational database management systems that would avoid Object Relational Impedance Mismatch between object oriented programming languages and RDBMSs by fully supporting all… … Wikipedia
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