Module 8: Miscellaneous Topics
Lecture 37: Aggregation
Aggregation
Query
consists of
attributes as well
For each attribute
and each corresponding attribute
of object
, there is a score of matching
to
Score of matching
to
is an aggregate function
of
such individual scores
NN query
:
Return k objects whose aggregate scores are the highest
consists of 
attributes as well
and each corresponding attribute 
of object 
, there is a score of matching 
of 