ALTER TABLE `tran_settlement_report` 
ADD COLUMN `car_id` varchar(32) NULL COMMENT '派车表id' AFTER `comp_id`,
ADD COLUMN `loading_img` varchar(255) NULL COMMENT '装车磅单' AFTER `unloading_weight`,
ADD COLUMN `unloading_img` varchar(255) NULL COMMENT '卸车磅单' AFTER `loading_img`;