ALTER TABLE `tran_car_info` 
ADD COLUMN `case_no` varchar(50) NULL COMMENT '箱号' AFTER `ship_no`,
ADD COLUMN `title_no` varchar(50) NULL COMMENT '封号' AFTER `case_no`,
ADD COLUMN `tran_price` float(11, 4) NULL COMMENT '运输单价' AFTER `title_no`;