Skyline Queries and Pareto Optimality
نویسندگان
چکیده
منابع مشابه
Skyline with Presorting: Theory and Optimizations
There has been interest recently in skyline queries, also called Pareto queries, on relational databases. Relational query languages do not support search for “best” tuples, beyond the order by statement. The proposed skyline operator allows one to query for best tuples with respect to any number of attributes as preferences. In this work, we explore what the skyline means, and why skyline quer...
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Skyline evaluation techniques (also known as Pareto preference queries) follow a common paradigm that eliminates data elements by finding other elements in a data set that dominate them. Nowadays already a variety of sophisticated skyline evaluation techniques are known, hence skylines are considered a well researched area. On the other hand, the skyline operator does not stand alone in databas...
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Abstract: Skyline, also known as Maxima in computational geometry or Pareto in business management field, is important for many applications involving multi-criteria decision making. The skyline of a set of multi-dimensional data points consists of the points for which no other point exists that is better in at least one dimension and at least as good in every other dimension. Although skyline ...
متن کاملEfficient skyline refinement using trade-offs respecting don't care attributes
Skyline Queries have received a lot of attention due to their intuitive query formulation. Following the concept of Pareto optimality all ‘best’ database items satisfying different aspects of the query are returned to the user. However, this often results in huge result set sizes. In everyday’s life users face the same problem. But here, when confronted with a too large variety of choices users...
متن کاملEfficient Skyline Queries under Weak Pareto Dominance
Skylines with partial order preference semantics often result in huge answer sets and what is worse, they cannot be computed efficiently. In this paper we will explore the evaluation of so-called restricted skyline queries with partial order preferences under the paradigm of weak Pareto dominance. Weak Pareto dominance removes all objects from skylines, which are dominated by other objects in s...
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تاریخ انتشار 2017