select a.*,b.itemclass, c.classid,d.barcode from reg_apply_detail a left join reg_TransitSample_detail d on (d.applyid = a.applyid and d.applyDetailId = a.uid),reg_item b,reg_itemclass c
where a.applyid = #{applyid} and a.OrderItemCode = b.itemcode and c.itemclass_code = b.itemclass
select b.classid,(case when isnull(a.yblx,'') = '' then b.itemclass_yblx else a.yblx end) as itemclass_yblx, a.* from reg_item a,reg_itemclass b where a.itemclass = b.itemclass_code and a.status = '0'