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what is the difference between adding keys & constraints
into a phisical file

Question Posted / kkcode400

Answer Posted / kkcode400

ADDING KEY FIELDS TO FILE IT DOES NOT CHECK THE EXISTING
DATA.

BUT CONSTRAINS CHECK THE EXISTING DATA BEFORE ADDING IT.
IF ANY DUPLICATE KEY VALUES ARE THERE OPERATION FAILURE.

Is This Answer Correct ?    1 Yes 1 No



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