You mention that you're calling fetchrow_hashref, which suggests you're using DBI. If this is the case, you should consider de-duping in your SQL SELECT statement rather than in your Perl code. The SQL dialect you're using might have a DISTINCT parameter that can be passed to SELECT.

If you find yourself writing Perl code to filter the results of a SQL query, it's usually a sign that the SQL query could be improved.

In reply to Re: Dulpicate data? is it worth de-duping? by tomhukins
in thread Dulpicate data? is it worth de-duping? by Ryszard

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