The techniques most extensively used to retrieve interesting data from data-sets are the Skyline and the Top-k queries. Sadly, they are not enough for facing modern problems, so the needing of something more usable and reliable has come. In this survey we are going to explore Flexible Skylines which are proposed to overcame the old fashion techniques' problems by extending the concept of dominance. After, we are going to compare this approach with the old and new ones evaluating pros and cons. Finally, we will see some interesting applications.

翻译：最广泛用来从数据集中检索有趣数据的技术是天线和Top-k查询。 不幸的是,它们不足以应对现代问题,因此需要更有用和更可靠的东西。在这次调查中,我们将探索灵活天空线,建议它们通过扩展支配地位的概念克服旧时尚技术问题。随后,我们将将这一方法与评估利弊的老办法和新办法进行比较。最后,我们将看到一些有趣的应用。