Functional Dependency

Question

Consider a relation R(ABCD) with functional dependency F:{ AD → B, AB → C }. Is AB → C partial or total dependency?

Comments

@Lakshman Patel RJIT Bro check out the link posted by @Soumya29

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Navathe says

from key itself remove an attribute and still if there dependency exists then it will be partial dependency

Here that is not the case

So, no partial dependency

Now A->B->C

here if B is not key or not part of key and then onlytransitive dependency exists

But here AB->C

B is part of key

So, can we not say no transitive dependency too?

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@srestha ma'am

According to a similar question in ACE material, AB is considered to be a part of key.