Consider the following statements S1 and S2 about the relational data model:…
GATE · 2021 · CS · Set 2 · Computer Science & IT
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?
- A.
Both S1 and S2 are true
- B.
S1 is true and S2 is false
- C.
S1 is false and S2 is true
- D.
Both S1 and S2 are false
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