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Un-Normalised Form (UNF)

To produce the Un-Normalised Form (UNF)of an entity we must:

  • list the attributes of the entity
  • identify the main key
  • identity the repeating group of attributes
  • identify its key

We carry out the process using a special document, as shown below. The keys are shown by a tick (() and the repeating group of attributes is shown bracketed.

Next: Converting to First Normal Form (1NF)