Lec 49: GATE 2024 Preparation | GATE 2021 PYQ By Jayesh Umre
Consider the following statements S1 and S2 about the relational data model:
S1: A relation scheme can have at most one foreign key.
S2: A foreign key in a relation scheme R cannot be used to refer to tuples of R.
Which one of the following choices is correct?
1. S1 is true and S2 is false.
2. Both S1 and S2 are true.
3. Both S1 and S2 are false.
4. S1 is false and S2 is true.
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