Q) In R(A,B,C,D)
FD's {AB->CD, C->D}
Is it in 3NF?
Ans) Vaise to shortcut (in x->y fd either x should be super key or y should be prime attribute to be in 3nf) ke hisaab se 3 nf main ni lagra in fd c->d, Par definition ke hisaab se ye 3 nf tab ni hota jab D transitively dependent hoti ab pe, par yaha directly bhi dependent hai transitively bhi
To isliye samjh nhi aa rha
Please help