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Relational Algebra - Basic Operators

relational algebra

Relational Algebra - Basic Operators


We are examining the basic operators used in Relational Algebra.


selection,projection,join diagram


Select: It's a selection operator.

Project: We can think of projecting one or more columns and lighting it.

Union: The merge operator.

Set Difference: Gets the difference between two clusters.

Cartesion Product: It makes cartesian product among the sets.

Rename: Renames associations. Used to change names.

Other operators:  Set Interseciton / Natural Join / Divison / Aggregate / Outher Join   

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