Your code snippet looks a little odd to me.
Maybe its a typo but wouldn't you want this: 
while (<>) {  
       my $quantity = param("quantity");
       $quantity = $dbh->quote( $quantity );
       my $gross_sales = param("gross_sales");
       $gross_sales = $dbh->quote( $gross_sales );
       my $sql2 = qq/
          INSERT INTO transaction_details (quantity, gross_sales) VALU
+ES ($quantity,  convert (money, $gross_sales))
       /;
       my $rv = $dbh->do( $sql2 );   
}

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In reply to Re: DBI SQL statement in while loop by rbc
in thread DBI SQL statement in while loop by peppiv

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