Teaching Rajasthan Basic Computer Instructor 2021 Mock Test DBMS Query Language Relational Model

Which of the following is a transitive rule in the relational model?

1
{x -> y, y -> z} | = x -> z
2
{x -> y} = xz -> yz
3
if x >= y, then x -> y 
4
{x -> yz} | = x -> y
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