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Current Comments
1 comments so far (post your own) View All Comments Latest 10 Comments:Primary key: for a relational database to work, every record needs to be identified on its own.
Unique key: you can specify that certain data in your dbms must be unique. These are constraints and can be added to more then one field at a time
Posted by sandr on Wednesday, 02.20.08 @ 14:02pm | #49194