text: DROP TABLE IF EXISTS user;
  DROP TABLE IF EXISTS sample;
  
  CREATE TABLE user (
      id INTEGER PRIMARY KEY AUTOINCREMENT,
      username TEXT UNIQUE NOT NULL,
      password TEXT NOT NULL
  );
  
  CREATE TABLE sample (
      id INTEGER PRIMARY KEY AUTOINCREMENT,
      file_name TEXT NOT NULL,
      file_path TEXT NOT NULL,
      q_bright INTEGER NOT NULL,
      q_dark INTEGER NOT NULL,
      q_full INTEGER NOT NULL,
      q_hollow INTEGER NOT NULL,
      q_smooth INTEGER NOT NULL,
      q_rough INTEGER NOT NULL,
      q_warm INTEGER NOT NULL,
      q_metallic INTEGER NOT NULL,
      q_clear INTEGER NOT NULL,
      q_muddy INTEGER NOT NULL,
      q_thin INTEGER NOT NULL,
      q_thick INTEGER NOT NULL,
      q_pure INTEGER NOT NULL,
      q_noisy INTEGER NOT NULL,
      q_rich INTEGER NOT NULL,
      q_sparse INTEGER NOT NULL,
      q_soft INTEGER NOT NULL,
      q_hard INTEGER NOT NULL,
      description TEXT
  );
  