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2 definitions found
 for relational database
From WordNet (r) 3.0 (2006) :

  relational database
      n 1: a database in which relations between information items are
           explicitly specified as accessible attributes; "in a
           relational database the data are organized as a number of
           differently sized tables"

From The Free On-line Dictionary of Computing (30 December 2018) :

  relational database
  RDBMS
  relational database management system
  relational DBMS
  
      (RDBMS - relational database management system) A
     database based on the relational model developed by
     E.F. Codd.  A relational database allows the definition of
     data structures, storage and retrieval operations and
     integrity constraints.  In such a database the data and
     relations between them are organised in tables.  A table is
     a collection of rows or records and each row in a table
     contains the same fields.  Certain fields may be designated
     as keys, which means that searches for specific values of
     that field will use indexing to speed them up.
  
     Where fields in two different tables take values from the same
     set, a join operation can be performed to select related
     records in the two tables by matching values in those fields.
     Often, but not always, the fields will have the same name in
     both tables.  For example, an "orders" table might contain
     (customer_id, product_code) pairs and a "products" table might
     contain (product_code, price) pairs so to calculate a given
     customer's bill you would sum the prices of all products
     ordered by that customer by joining on the product-code fields
     of the two tables.  This can be extended to joining multiple
     tables on multiple fields.  Because these relationships are
     only specified at retreival time, relational databases are
     classed as dynamic database management system.
  
     The first commercial RDBMS was the Multics Relational Data
     Store, first sold in 1978.
  
     INGRES, Oracle, Sybase, Inc., Microsoft Access, and
     Microsoft SQL Server are well-known database products and
     companies.  Others include PostgreSQL, SQL/DS, and RDB.
  
     ["Managing Data Bases, Four Critical Factors" Michael
     M. Gorman, QED Information Sciences, Inc.].
  
     ["An Introduction To Database Systems" (6th ed) C. J. Date,
     Addison Wesley (an excellent source of detailed info)].
  
     ["An End-User's Guide to Data Base" James Martin, Prentice
     Hall (excellent place to begin learning about DBMS)].
  
     (2002-06-10)
  

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