CODEWITHSUNDEEP
databaserelation
jyz
jyz

Reputation: 19

How to judge whether a dependency is in the Relation?

We have a relation R(A1, A2, A3, A4) The table is enter image description here There are three functional dependencies :

a) A4 -> A1, 
b) {A2, A3} -> A4, 
c) {A2, A3} -> A1

which of them are dependencies in R?

Upvotes: 0

Views: 38

Answers (0)

Related Questions