select usable_stock from dc_daily_stock where bailun_sku=#{bailun_sku} and warehouse_code=#{warehouse_code} and record_time=DATE_SUB(curdate(),INTERVAL 2 DAY)
select usable_stock from dc_daily_stock where bailun_sku=#{bailun_sku} and warehouse_code=#{warehouse_code} and record_time=DATE_SUB(curdate(),INTERVAL 2 DAY)