(update First of all, $rowdata contains a hashref, that's not the same as %rowdata. You have to use $rowdata->{'id'} instead of $rowdata{'id'}. And now, continuing with the rest of the story, assuming that is fixed...)

use strict;!!!

You're doing this in two steps. As a result of the line 

$hash{$rowdata->{'id'}} = $rowdata->{'id'};

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$hash{$rowdata->{'id'}} has an integer for a value, and you're using that as a symbolic reference to a new hash.

use strict would have prevented you from doing that.

I think you can change the code to do what you want, by changing that line to 

$hash{$rowdata->{'id'}} = { '' => $rowdata->{'id'} };

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In reply to Re: building a hash from a database by bart
in thread building a hash from a database by bfdi533

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