Using the crowd for top-k and group-by queries
Susan B. Davidson, Sanjeev Khanna, Tova Milo, Sudeepa Roy · 2013
Group-by and top-k are fundamental constructs in database queries. However, the criteria used for grouping and ordering certain types of data -- such as unlabeled photos clustered by the same person ordered by age -- are difficult to evaluate by machines. In contrast, these tasks are easy for humans to evaluate and are therefore natural candidates for being crowd-sourced.