code: func (aia *AIA) Select(tx *sql.Tx) error {
  	row := tx.QueryRow(`SELECT url FROM aia WHERE ski=?`, aia.SKI)
  	err := row.Scan(&aia.URL)
  	if err != nil {
  		return err
  	}
  
  	return nil
  }
docs: // Select requires the SKI field to be filled in.