1 votes 1 votes Consider the join of a relation $R$ with relation $S$. If $R$ has $m$ tuples and $S$ has $n$ tuples, then the maximum size of join is $mn$ $m+n$ $(m+n)/2$ $2(m+n)$ Databases nielit2017july-scientistb-it databases joins tuple-relational-calculus + – admin asked Mar 30, 2020 • retagged Aug 23, 2020 by Lakshman Bhaiya admin 535 views answer comment Share Follow See all 0 reply Please log in or register to add a comment.
2 votes 2 votes First step in join is cross product. As here there is no key constrain we can have all values same for the field we are performing join on. Hence maximum will be mn tuples. So A is correct. smsubham answered Mar 30, 2020 smsubham comment Share Follow See all 0 reply Please log in or register to add a comment.
0 votes 0 votes Answer: A because there is no constraint mentioned on the question that is on what attributes it has to apply thus indirectly is saying about the cross product, and we also know that Join:- Cross Product + Selection Àbhíjèét Míshrà answered Oct 12, 2020 Àbhíjèét Míshrà comment Share Follow See all 0 reply Please log in or register to add a comment.
