select io_art, io_desc, ordprice, ordunits, ordhandle, listbox1, listbox2, listbox3, listbox4, listbox5, sum(ordprice*ordunits)::decimal(14,2) from buy where clientnr=('b96454') and ordernr=('12393') group by io_art, io_desc, ordprice, ordunits, ordhandle, listbox1, listbox2, listbox3, listbox4, listbox5;<br>
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Undefined variable:$artnotf<br>