SET NAMES utf8mb4;
SET FOREIGN_KEY_CHECKS = 0;

ALTER TABLE `wfc_user_db`.`u_bill`
ADD COLUMN `invoice_number` varchar(64) NULL COMMENT '发票编号' AFTER `status`,
ADD COLUMN `invoice_file` varchar(255) NULL COMMENT '发票文件' AFTER `invoice_number`

ALTER TABLE `wfc_user_db`.`u_bill`
ADD COLUMN `invoice_time` datetime NULL COMMENT '发票时间' AFTER `invoice_file`

SET FOREIGN_KEY_CHECKS = 1;