Relational Database Management System (RDBMS) Question: Download Questions PDF
What is Functional Dependency?
Answer:
Functional dependency is denoted by X --> Y between two sets of attributes X and Y that are subsets of R specifies a constraint on the possible tuple that can form a relation state r of R. The constraint is for any two tuples t1 and t2 in r if t1[X] = t2[X] then they have t1[Y] = t2[Y]. This means the value of X component of a tuple uniquely determines the value of component Y.
Download RDBMS Interview Questions And Answers
PDF
| Previous Question | Next Question |
| What is normalization? | When is a functional dependency F said to be minimal? |