text: -- Up
  CREATE TABLE Post (
      id INTEGER PRIMARY KEY AUTOINCREMENT,
      date TEXT,
      tag INTEGER REFERENCES Tag(id),
      like INTEGER
  );
  
  CREATE TABLE Text(
      id INTEGER PRIMARY KEY AUTOINCREMENT,
      post INTEGER REFERENCES Post(id),
      content TEXT
  );
  
  CREATE TABLE File(
      id INTEGER PRIMARY KEY AUTOINCREMENT,
      post INTEGER REFERENCES Post(id),
      type TEXT,
      url TEXT
  );
  
  CREATE TABLE PostScript(
      id INTEGER PRIMARY KEY AUTOINCREMENT,
      post INTEGER REFERENCES Post(id),
      date TEXT,
      content TEXT
  );
  
  CREATE TABLE Tag(
      id INTEGER PRIMARY KEY AUTOINCREMENT,
      name TEXT,
      description TEXT
  );
  
  -- Down
  DROP TABLE Post;
  
  DROP TABLE Text;
  
  DROP TABLE File;
  
  DROP TABLE PostScript;
  
  DROP TABLE Tag;