ATTRIBUTE CLOSURE

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Attribute Closure: Attribute closure of an attribute set can be defined as set of attributes which can be functionally determined from it.


To find attribute closure of an attribute set:

Add elements of attribute set to the closure set.

Recursively add elements to the closure set which can be functionally

determined from the present elements of the closure  set.


Attribute closure of an attribute set A of given relation R can be represented as A+






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