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Permalink Reply by Madge Mun on September 17, 2013 at 3:55am

The record knows a field, which uniquely identifies each row, as a key.

- The Maximum limit of keys which are allowed in a record is fifteen.
- According, to the key field, you can search and retrieve data from the database.
-This will not allow duplicate and not null values.
- It also allows multiple keys.

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