Write the names of most appropriate columns, which can be considered as candidate keys.
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dear,you haven't given the required info like what are those columns
a candidate key is a column other than the primary key which can uniquely identify a database record
for eg. in a school database the admission no. can be the candidate key if the roll no. is the primary key
a candidate key is a column other than the primary key which can uniquely identify a database record
for eg. in a school database the admission no. can be the candidate key if the roll no. is the primary key
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