text: drop table if exists imgtab;
  drop table if exists picrotab;
  drop table if exists rowtab;
  drop table if exists tapetab;
  drop table if exists bytrotab;
  create table imgtab (
    id integer primary key autoincrement,
    proid integer,
    filename text not null,
    iscore bool
  );
  create table picrotab (
    id integer primary key autoincrement,
    bytid integer,
    picroname text not null
  );
  create table bytrotab (
    id integer primary key autoincrement,
    bytroname text not null
  );
  
  