Relational DBMS.

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  • Ruby17
    Member
    • Sep 2008
    • 56

    Relational DBMS.

    RELATIONAL DBMS

    Edgar Codd worked at IBM in San Jose, California, in one of their offshoot offices that was primarily involved in the development of hard disk systems. He was unhappy with the navigational model of the Codasyl approach, notably the lack of a "search" facility which was becoming increasingly useful. In 1970, he wrote a number of papers that outlined a new approach to database construction that eventually culminated in the groundbreaking A Relational Model of Data for Large Shared Data Banks.[1]

    In this paper, he described a new system for storing and working with large databases. Instead of records being stored in some sort of linked list of free-form records as in Codasyl, Codd's idea was to use a "table" of fixed-length records. A linked-list system would be very inefficient when storing "sparse" databases where some of the data for any one record could be left empty. The relational model solved this by splitting the data into a series of normalized tables, with optional elements being moved out of the main table to where they would take up room only if needed.
  • Guest

    #2
    relational database management system has relation between the related tables and these related tables were having the unique keys in them.Two or more than two tables are joined or combined to form a new table with new values but which are present in its parent table.

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    • gretyukecy
      Junior Member
      • Feb 2009
      • 3

      #3
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      • sonia sharma
        Senior Member
        • Jul 2015
        • 156

        #4
        Relational database management system Abbrivated as (RDBMS)is a type of database management system that is used to store the data in the form of tables, And the most important feature of relational Database management System is that a single database can be spread across several tables.

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        • Guest

          #5
          Relational Database Management system is a type of database in which we stored similar type of tables in a single database.

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          • Daljeet
            Senior Member
            • Dec 2014
            • 205

            #6
            Right,Alka RDBMS is a type of database in which stored the similar types of table in single database.So Many popular databases currently in use are based on the relational database model.

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