code: def load(self):
          
  
          self._validate()
  
          formatter = SqliteTableFormatter(self.source)
          formatter.accept(self)
  
          return formatter.to_table_data()
docs: Extract tabular data as |TableData| instances from a SQLite database
          file. |load_source_desc_file|
  
          :return:
              Loaded table data iterator.
              |load_table_name_desc|
  
              ===================  ==============================================
              Format specifier     Value after the replacement
              ===================  ==============================================
              ``%(filename)s``     |filename_desc|
              ``%(key)s``          ``%(format_name)s%(format_id)s``
              ``%(format_name)s``  ``"sqlite"``
              ``%(format_id)s``    |format_id_desc|
              ``%(global_id)s``    |global_id|
              ===================  ==============================================
          :rtype: |TableData| iterator
          :raises pytablereader.DataError:
              If the SQLite database file data is invalid or empty.