mysql query not working -


i working on query joins several tables.here's code. query works fine until time add third line sum(saleitems_t.qtymajor) sales. error message says unknown column 'saleitems_t.qtymajor' in 'field list' trying build reorder worksheet.help appreciated.

select productmaster_t.productname_vc pgroup,  stockmain_t.itemdescription item, sum(saleitems_t.qtymajor) sales, stockbuffers_t.buffer_qty bufferqty,  (stkbalance_t.aj1+stkbalance_t.ar2+stkbalance_t.ad3+stkbalance_t.dx4) stock,  (stkbalance_t.aj1+stkbalance_t.ar2+stkbalance_t.ad3+stkbalance_t.dx4)-stockbuffers_t.buffer_qty result productmaster_t, stockmain_t, stockbuffers_t, stkbalance_t stockmain_t.itemcode = stockbuffers_t.itemcode  , stockmain_t.itemcode = stkbalance_t.itemid , productmaster_t.productid = stockmain_t.prodid , saleitems_t.itemid = stockmain_t.itemcode order productname_vc,itemdescription asc

you haven't referenced saleitems_t table in query, either in clause, or through join.


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