0 votes 0 votes Databases cartesian-product + – neha pawar asked Jan 14, 2015 neha pawar 882 views answer comment Share Follow See all 0 reply Please log in or register to add a comment.
1 votes 1 votes i think its mxn.. I find no reason why null make a difference Bhagirathi answered Jan 16, 2015 Bhagirathi comment Share Follow See all 2 Comments See all 2 2 Comments reply neha pawar commented Jan 16, 2015 reply Follow Share ok..means if no common attribute the min and max tuples from cartesian product is m*n, there is no effect of null, is that correct? 1 votes 1 votes Bhagirathi commented Jan 22, 2015 reply Follow Share When you are doing a join operation ...we are only bothered about the set of common attributes .. Now note this: null compared to anything is nt equal.. nt even null compared with null is equal 0 votes 0 votes Please log in or register to add a comment.