Preference Query Analysis and Optimization

Annotation This book analyzes unexpected preference query results for three problems: causality and responsibility problems, why-not and why questions, and why-few and why-many questions. Further, it refines preference queries and discusses how to modify the original preference query based on different objectives, in order to obtain satisfying results. This highly informative and carefully presented book provides valuable insights for researchers, postgraduates and practitioners with an interest in database usability Front Matter ....Pages i-xi Introduction to Preference Query Analysis and Optimization (Yunjun Gao, Qing Liu)....Pages 1-7 Causality and Responsibility Problem on Probabilistic Reverse Skyline Queries (Yunjun Gao, Qing Liu)....Pages 9-29 Why-Not and Why Questions on Reverse Top-k Queries (Yunjun Gao, Qing Liu)....Pages 31-74 Why-Few and Why-Many Questions on Reverse Skyline Queries (Yunjun Gao, Qing Liu)....Pages 75-99 Reverse Top-k Query Result Analysis and Refinement System (Yunjun Gao, Qing Liu)....Pages 101-108 Conclusion and Future Work (Yunjun Gao, Qing Liu)....Pages 109-110