okakon
Unknown   India
 
 
bazinga!!!
Momenteel offline
♛︎ KiNG 14 aug 2018 om 5:05 
SEM nyc
76561198448738312 29 nov 2017 om 2:28 
B***** B******
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA 28 nov 2017 om 6:33 
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Have a good day tomorrow!
76561198448738312 28 nov 2017 om 1:27 
i love you
vizal96 25 nov 2017 om 5:22 
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AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA 24 nov 2017 om 0:57 
A superkey is a set of one or more attributes that, taken collectively, allow us to identify uniquely a tuple in the relation. For example, the ID attribute of the relation instructor is sufficient to distinguish one instructor tuple from another. Thus, ID is a superkey. The name attribute of instructor, on the other hand, is not a superkey, because several instructors might have the same name.