  Nowadays, as the quantity of data to process began to rise, so did the need
for a method to discern what pieces of information could be useful for the
user; in response, researchers focused their efforts on improving the already
existing ranking methods or creating new ones starting from them. This survey
will be presented a small list of some of the most known and/or most recent
solutions proposed, with some possible applications for them, concerning a
state of the art restricted to around the last ten years, comparing their
performance with the traditional one top-k and skyline queries.
