text: -- Create table
  create table SYS_USER
  (
    id              NUMBER(20) not null,
    user_name       NVARCHAR2(60) not null,
    password        NVARCHAR2(64) not null,
    nick_name       NVARCHAR2(50) not null,
    user_profile    NVARCHAR2(250) not null,
    user_url        NVARCHAR2(100) not null,
    mobile          NVARCHAR2(11) not null,
    email           NVARCHAR2(100) not null,
    activation_key  NVARCHAR2(60) not null,
    status          NUMBER(11) not null,
    user_registered DATE not null,
    user_desc       NVARCHAR2(255)
  )
  tablespace BGDATA
    pctfree 10
    initrans 1
    maxtrans 255
    storage
    (
      initial 64K
      next 1M
      minextents 1
      maxextents unlimited
    );
  -- Add comments to the table
  comment on table SYS_USER
    is '用户信息表';
  -- Add comments to the columns
  comment on column SYS_USER.id
    is '用户ID';
  comment on column SYS_USER.user_name
    is '登录名';
  comment on column SYS_USER.password
    is '密码';
  comment on column SYS_USER.nick_name
    is '昵称';
  comment on column SYS_USER.user_profile
    is '简介';
  comment on column SYS_USER.user_url
    is '首页链接';
  comment on column SYS_USER.mobile
    is '手机';
  comment on column SYS_USER.email
    is '邮箱';
  comment on column SYS_USER.activation_key
    is '激活码';
  comment on column SYS_USER.status
    is '用户状态(1:启用,0:禁用)';
  comment on column SYS_USER.user_registered
    is '注册时间';
  comment on column SYS_USER.user_desc
    is '用户备注';
  