The Preference SQL System - An Overview

@article{Kieling2011ThePS,
  title={The Preference SQL System - An Overview},
  author={Werner Kie\ssling and Markus Endres and Florian Wenzel},
  journal={IEEE Data Eng. Bull.},
  year={2011},
  volume={34},
  pages={11-18}
}
Preference SQL is a declarative extension of standard SQL by strict partial order preferences, behaving like soft constraints under the BMO query model. Preference queries can be formulated intuitively following an inductive constructor-based approach. Both qualitative methods like e.g. Pareto / skyline and quantative methods like numerical ranking, definable over categorical as well as numerical attribute domains can be used. The Preference SQL System is implemented as a middleware component… CONTINUE READING
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