text: create database bookmarks;
  use bookmarks;
  create table user 
   (
    username varchar(16) primary key,
    passwd varchar(16) not null,
    email varchar(100) not null
    );
  create table bookmark
   (
     username varchar(16) not null,
     bm_URL varchar(255) not null,
     index(username),
     index(bm_URL)
   );
   create table recommend
   (
   username varchar(16) not null,
     bm_URL varchar(255) not null,
     index(username),
     index(bm_URL)
    
   );
  grant select,insert,update,delete
  on bookmarks.*
  to bm_user@localhost identified by '';
  