? every tuple of r1 has adistinct value for k.
Computers and Technology, 31.07.2019 01:10 Ivonne728
If k is a foreign key in relation r1, then
? every tuple of r1 has adistinct value for k.
? k cannot have a nullvalue for tuples in r1.
? k is a key for someother relation.
? k is a primary key forr1.
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If k is a foreign key in relation r1, then
? every tuple of r1 has adistinct value for k.
? every tuple of r1 has adistinct value for k.
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