0 votes 0 votes If a relation is having (A,B,C,D) And product rules A->b B->c ..... Then A be candidate key or we have to include D too I AD ..… Databases candidatekey databases + – Fida asked Dec 27, 2018 • retagged May 25, 2020 by soujanyareddy13 Fida 260 views answer comment Share Follow See all 3 Comments See all 3 3 Comments reply prashant jha 1 commented Dec 27, 2018 reply Follow Share Yes 0 votes 0 votes Fida commented Dec 27, 2018 reply Follow Share Do we have to eliminate D!!! 0 votes 0 votes prashant jha 1 commented Dec 27, 2018 reply Follow Share Candidate and primary key will be AD. D cannot be eliminated , it's part of relation. 0 votes 0 votes Please log in or register to add a comment.