sys_hs_info  供应商
sys_item_del 删除的商品
pos_sydb
pos_syds
sys_goods

sx# 货号
tm 条码
na 名字
jj  进货价
lsj  卖价


SELECT sx#,tm,na,jj,lsj  FROM sys_item_info

SELECT sx#,tm,na,jj,lsj  FROM t_item_info