0 votes 0 votes Databases made-easy-test-series databases joins + – vaishali jhalani asked Feb 2, 2017 • edited Mar 4, 2019 by adeebafatima1 vaishali jhalani 440 views answer comment Share Follow See all 5 Comments See all 5 5 Comments reply Aditya Tewari commented Feb 2, 2017 reply Follow Share 800 ? 0 votes 0 votes vaishali jhalani commented Feb 2, 2017 reply Follow Share Ya but when RST has a natural join with U , why you consider cross product, here the common attribute is D 0 votes 0 votes Aditya Tewari commented Feb 2, 2017 reply Follow Share D is not a primary key...And we have to consider for the maximum possible value. 0 votes 0 votes vaishali jhalani commented Feb 2, 2017 reply Follow Share A NATURAL JOIN is a JOIN operation that creates an implicit join clause for you based on the common columns in the two tables being joined. 0 votes 0 votes Smriti012 commented Feb 2, 2017 reply Follow Share Finally we would be getting key as AEH of the complete joins... hence =80*10=800 tuples 0 votes 0 votes Please log in or register to add a comment.