0 votes 0 votes Given answer: B I don't know what are closed set in databases. Please give some references for explaining it. Databases databases + – shikharV asked Dec 8, 2015 shikharV 270 views answer comment Share Follow See all 3 Comments See all 3 3 Comments reply Umang Raman commented Dec 8, 2015 reply Follow Share May be it means superkey. 0 votes 0 votes shikharV commented Dec 8, 2015 reply Follow Share Is there anything called as closed set? 0 votes 0 votes Umang Raman commented Dec 8, 2015 reply Follow Share i dont know closure set is there. 0 votes 0 votes Please log in or register to add a comment.