Monday 20 October 2014

Special relational operations | Relational Model

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SPECIAL RELATIONAL OPERATIONS

 These includes operations like
 
  1. Selection
  2. Projection
  3. Join
  4. Division
1. Selection-To identify a set of tuples which is a part of a relation and to extract only these tuples out. The select operation selects tuples that satisfy a given predicate or condition. It is also known as restriction operation. 
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