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Title: From Relational Calculus to Relational Algebra - PowerPoint PPT Presentation
Description: there is a relational algebra exp to represent dom(y) ... dom(y) is the union of all D(R)'s over relations R referred to in y together ... – PowerPoint PPT presentation
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PPT URL: https://www.dcs.warwick.ac.uk/~wmb/CS319/ppt/drelcalc.ppt
