text: use mydb;
  create table if not exists sys_config(
    id int not null primary key auto_increment comment '主键',
    param varchar(32) not null comment '参数',
    value varchar(64) not null comment '参数值',
    param_desc varchar(200) default '' comment '参数描述',
    update_time datetime not null default now() comment '更新时间',
    available int default 1 not null comment '是否可用:1可用2不可用',
    unique key uq_sys_config_param(param)
  )engine =innodb default charset=utf8mb4;
  