ALTER TABLE `tran_process_info` 
ADD COLUMN `tran_price_car` float(11, 4) NULL COMMENT '当前单价(按车)' AFTER `tran_price_ing`,
ADD COLUMN `tran_price_ing_car` float(11, 4) NULL COMMENT '审核中的单价(按车)' AFTER `tran_price_car`,
ADD COLUMN `billing_method` varchar(50) NULL COMMENT '计费方式(按吨，按车)' AFTER `tran_price_ing_car`;