create database if not exists uav_data_post_process DEFAULT CHARACTER SET utf8mb4 COLLATE utf8mb4_bin; use uav_data_post_process; alter table data_management add error_message varchar(100) null comment '错误信息'; alter table product_management add error_message varchar(100) null comment '错误信息'; alter table result_management add error_message varchar(100) null comment '错误信息';