Disclaims:

Always study and research the information here first before use! UAYOR!

Codd's Rules No 06: Provides Alternatives for Viewing Data

  • Views are virtual tables or abstractions of the source tables
  • A view is an alternative way of looking at data from one or more tables
  • A view definition does not duplicate data
  • A view is not a copy of the data in the source tables
  • Once created, a view can be manipulated in the same way as a source data
  • If you change data in a view, you are changing the underlying data in the source table (although there are limits on how data can be modified from a view)

0 comments:

  © Blogger template 'A Click Apart' by Ourblogtemplates.com 2008

Back to TOP