Views for Dummies

Can someone give me an explanation what a view does and how it works?

I have to use SQL code that was done by others and  their views are very long -- makes it confusing.
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Guy Hengel [angelIII / a3]Billing EngineerCommented:
please start reading here:

need more clarifications?

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awking00Information Technology SpecialistCommented:
Basically, a view is not much more than a memorized query that gets updated (refreshed) based on the criteria established at the time of the view's creation.
if you have a complicated sql statement that you need to keep, turn it into a view.
SQL> select * from <view>; will then be interpreted as SQL> select * from ( really complicated sql statement );
it simplifies things for you.
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