## Relational algebra, Database Management System

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Relational Algebra is a set of basic operations used to influence the data in relational model. These operations allow the user to specify basic retrieval request. The result of retrieval is a new relation, produced from one or more relations. These operations can be divided  in two categories:

•  Basic Set Operations

1)  UNION

2)  SET DIFFERENCE

3)  INTERSECTION

4)  CARTESIAN PRODUCT

•  Relational Operations

1)   JOIN

2)  PROJECT

3) SELECT

4)  DIVISION

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