PSQL swMATH ID: 2180 Software Authors: Dey, Debabrata; Sarkar, Sumit Description: PSQL: A query language for probabilistic relational data. Database systems based on the relational model have become very popular for the storage of large volumes of business-related data. Although the relational model provides a great range of advantages over other data models, it was designed to support deterministic data and, consequently, it lacks a comprehensive way for handling uncertain data. However, in all real-world environments, uncertainty in data values is a common occurrence. Therefore, there is a need to extend the relational model so that data uncertainty can be captured explicitly. In an earlier work, we have proposed a probabilistic relational algebra that is a consistent extension of the conventional relational algebra and is reducible to the latter. The contribution of this work is the development of a non-procedural probabilistic query language – structured around the popular SQL – that can be built on top of that algebra. We formalize the extended syntax, provide examples to illustrate the syntax, and examine query formulation from a decision-theoretic perspective. Homepage: http://www.sciencedirect.com/science/article/pii/S0169023X98000159 Keywords: data uncertainty; probabilistic relational model; probabilistic SQL; query language Related Software: ProbView; ProTDB Cited in: 4 Documents Standard Articles 1 Publication describing the Software, including 1 Publication in zbMATH Year PSQL: A query language for probabilistic relational data. Zbl 0910.68064Dey, Debabrata; Sarkar, Sumit 1998 all top 5 Cited by 11 Authors 1 Bailey, David Harold 1 Borwein, Jonathan Michael 1 Dekhtyar, Alex 1 Dey, Debabrata 1 Eiter, Thomas 1 Girgensohn, Roland 1 Goldsmith, Judy 1 Lukasiewicz, Thomas 1 Sarkar, Sumit 1 Walter, Michael 1 Zhao, Wenzhong Cited in 2 Serials 1 Data & Knowledge Engineering 1 Cited in 3 Fields 3 Computer science (68-XX) 1 General and overarching topics; collections (00-XX) 1 Number theory (11-XX) Citations by Year