Synthesis Lectures on Data Management: Query Processing over Incomplete Databases (PDF)
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Incomplete data is part of life and almost all areas of scientific studies. Users tend to skip certain fields when they fill out online forms; participants choose to ignore sensitive questions on surveys; sensors fail, resulting in the loss of certain readings; publicly viewable satellite map services have missing data in many mobile applications; and in privacy-preserving applications, the data is incomplete deliberately in order to preserve the sensitivity of some attribute values.
Query processing is a fundamental problem in computer science, and is useful in a variety of applications. In this book, we mostly focus on the query processing over incomplete databases, which involves finding a set of qualified objects from a specified incomplete dataset in order to support a wide spectrum of real-life applications. We first elaborate the three general kinds of methods of handling incomplete data, including (i) discarding the data with missing values, (ii) imputation for the missing values, and (iii) just depending on the observed data values. For the third method type, we introduce the semantics of k-nearest neighbor (kNN) search, skyline query, and top-k dominating query on incomplete data, respectively. In terms of the three representative queries over incomplete data, we investigate some advanced techniques to process incomplete data queries, including indexing, pruning as well as crowdsourcing techniques.
Xiaoye Miao is a Postdoctoral Fellow at the Department of Computer Science, City University of Hong Kong, China. She received a Ph.D. in computer science from Zhejiang University, China in 2017 and received a B.S. from the College of Computer Science at Xi'an Jiaotong University, China, in 2012. Her research interests include Incomplete/Uncertain Data Management, Graph Data Management, Data Pricing, and Data Cleaning. She has published more than 15 papers in several premium/leading international journals and conferences including VLDBJ, TKDE, VLDB, and ICDE. She is serving or has served as an (external) reviewer for a variety of important international journals and conferences such as VLDB Journal, TKDE, Information Sciences, WWW Journal, JCST, VLDB, ICDE, DASFAA, SIGSPATIAL GIS, APWeb, WAIM, DEXA, among others.
- Autoren: Yunjun Gao , Xiaoye Miao
- 2018, 122 Seiten, Englisch
- Verlag: Morgan & Claypool Publishers
- ISBN-10: 1681734214
- ISBN-13: 9781681734217
- Erscheinungsdatum: 20.08.2018
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- Größe: 1.63 MB
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