Unknown column '' in 'order clause'select *, 1 as `table` from `catalog_i` where `C_ID` LIKE '%,40,%' AND catalog_i.STATUS <> 0 UNION SELECT *,  2 as `table` FROM `oddments_i` WHERE `oddments_i`.`C_ID`='40' AND `oddments_i`.`C_ID` <> 'NULL' AND `oddments_i`.`C_ID` <> '' AND `oddments_i`.`STATUS` <> 0 AND `oddments_i`.`ARTICUL` NOT IN (select `ARTICUL` from `catalog_i`  where `C_ID` LIKE '%,40,%' AND catalog_i.STATUS <> 0 ) order by `PRICE` ASC, ``  limit 0,12