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The Relational Data Model

The Relational Data Model. E.F Codd A Relational Data Model for Large Shared Data Banks (1970) The basic model used by Access, Oracle, DB2 All Relational DBMSs depart from the basic model. Components. The concepts available to represent the UoD Relations (tables) of Tuples (rows) , of

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Relational Database

Foreign key. Primary key. Relational Database. EMP. DEPT. EMPNO ENAME DEPTNO ------ ------- ------- 7839 KING 10 7698 BLAKE 30 7782 CLARK 10 7566 JONES 20 7654 MARTIN 30 7499 ALLEN 30 7844 TURNER 30

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30 sales chicago - PowerPoint PPT Presentation

The Relational Data Model

Relational Database