You can most likely preclude empty/invalid data with SQL.  Let's say your
field/column name is 'name'.  Then with your DBI prepare() call, you can
preclude records where name is blank, null, or whatever you'd like.

$sth = $dbh->prepare( 'SELECT * FROM table WHERE name IS NOT NULL' );
$sth->execute;

# Proceed with your fetchrow_hashref()'s, etc

HTH & Have Fun!

Jason

"T. Murlidharan Nair" <[EMAIL PROTECTED]> wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> Hi!!
> I have a CGI that looks up data from a mysql data base and
> does a bunch of calculations.  I only want to do calculations
> on the columns which contains any data.  What I mean is for
> some colums there is no data available at all.  So I don't want to do
> any calculations on them obviously.  How do I check whether
> the column contains data, once I have retrived all the  data
> using fetchrow_hashref().
> Thanks and Cheers alway!!
> Murli
>
>



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