text: create table notice
  (
      id          int unsigned auto_increment
          primary key,
      category_id int          default 0  not null comment '通知分类id',
      title       varchar(50)  default '' not null comment '公告标题',
      content     text                    not null comment '公告正文',
      outline     varchar(255) default '' not null comment '概要',
      create_by   int          default 0  not null comment '创建人id',
      update_by   int          default 0  not null comment '更新人id',
      status      tinyint      default 1  null comment '公告状态',
      publish_at  timestamp               not null comment '发布时间',
      created_at  timestamp               null,
      updated_at  timestamp               null,
      deleted_at  timestamp               null
  )
      comment '公告表' collate = utf8mb4_unicode_ci;
  
  create index notice_title
      on notice (title);