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Sep 3rd, 2010, 02:46 PM
#4
Re: Super Key, Candidate Key and Primary Key
by itself, EmpID uniquely identifies a row. By itself, SSN uniquely identifies a unique row. Together EmpID and SSN uniquely identify a row .... each one of those is an example of a CandidateKey... in short it is the combination of the minimal number of cols to uniquely identify rows...
-tg
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