Finding strings inside a field...

Hello all.
   Could any one tell me if the following is possible using
PostgreSQL?

I want to be able do a SELECT and search for a string INSIDE OF a
field. So, say I want to get all record in testtable which contain
the word "foobar" inside the "description" attribute. The following
will only get those records in which the "description" attribute
contains ONLY the word "foobar":

SELECT FROM testtable WHERE description='foobar';

What do I need to do to get all the record that have "foobar"
ANYWHERE within the "description" field?
   Thanks a lot.
 --Dan

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 Daniel G. Delaney                    The Louisville Times Chorus
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