KEYS

1. Carilah KF-2 dari tabel tersebut

2. Carilah Superkey, candidate key dan primary key

R: A B C D E F G H I J

FD :

       D → E                                                  

       C → D E                                           

       F → G                                               

       G → I                                                

       H I → J                                           

       A → B                                             

       B → C                               

 Penyelesaian :    

       A → B

       B → C

       C → D E

       A F → A B C D E F G

       G → I

       A F H → A B C D E F G H I J

 Jadi :

      Super Key         = AFH

      Candidate Key  = AFH

      Primary Key     = AFH