4 votes 4 votes Identify the minimal key for relational scheme $R(A, B, C, D, E)$ with functional dependencies $F = \left\{A \rightarrow B, B \rightarrow C, AC \rightarrow D\right\}$ $A$ $AE$ $BE$ $CE$ Databases ugcnetcse-dec2014-paper2 databases database-normalization + – makhdoom ghaya asked Jul 20, 2016 recategorized Jan 1, 2020 makhdoom ghaya 4.4k views answer comment Share Follow See all 0 reply Please log in or register to add a comment.
Best answer 4 votes 4 votes {A}+={ A , B , C , D } Here A can not be a key because we can't get attribute E from here. {AE}+ = { A , B , C , D ,E } Here AE is the minimal key.We can't remove anything from it. Hence,Option(B)AE. LeenSharma answered Jul 20, 2016 selected Jul 20, 2016 by ManojK LeenSharma comment Share Follow See 1 comment See all 1 1 comment reply Tauhin Gangwar commented Jul 20, 2016 reply Follow Share correct 0 votes 0 votes Please log in or register to add a comment.