  Topk queries and skyline queries have well explored limitations which recent
research have tried to complete through new techniques. In this survey, after
resuming such limitations, we consider Restricted Skyline Queries, ORD and ORU
approach, Krepresentative minimization queries, Skyline ordering queries, UTK
queries approach and Skyrank that aim to overcome them. After introducing and
comparing their main concepts, pros and cons, we briefly report the algorithms
and confront some of the experimental data collected from the bibliography. To
conclude the paper, we summarize the results presented with a short guide on
how to select the best approach according to specific needs.
