Computer Science ›› 2012, Vol. 39 ›› Issue (Z6): 265-270.
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Abstract: With the development of ICT, data management has meet more and more challenge, one of challenge is uncer tainty of data. This paper proposed a probabilistic data model based on existence of tuple, compared with other models,this model was proved to be complete, and we proposed corresponding probabilistic relational algebra and query algo rithm.
Key words: Uncertain data, Probabilistic database, Probabilistic data model, Probabilistic relational algebra
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