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  • Created by: Deepa
  • Created on: 27-03-13 14:54
  • A key field identifies a unique record in a database. it is used to make sure two people with the same name are not confused. An ID number is often used as a key field e.g. your national insurance number.
  • You can set up validation checks to make sure the data you entered is correct.
  • presence check- you want something to be entered.
  • type check- it must be a numeric or character.
  • format check-


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