Download Ranking of Database Query Results

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Transcript
The ranking formula
Score(t )  
yY
p( y | W )
p ( x | y, W )

p( y | D) yY xX p( x | y, D)
This is the final ranking formula that we will use in
computing scores of tuples in order to rank them.
The ranking formula is composed of two large factors:
 Global part of the score: measures the global importance of
unspecified attributes
 Conditional part of the score: measures the dependencies
between the specified and unspecified attributes
