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

निम्नलिखित में से कौन संबंधपरक मॉडल में एक संक्रमणीय नियम है?

1

{x -> y, y -> z} | = x -> z

2

{x -> y} = xz -> yz

3

यदि x >= y, तब x -> y

4

{x -> yz} | = x -> y

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