code: def as_create_table(self, table_name, overwrite=False):
          
          exec_sql = ''
          sql = self.stripped()
          if overwrite:
              exec_sql = f'DROP TABLE IF EXISTS {table_name};\n'
          exec_sql += f'CREATE TABLE {table_name} AS \n{sql}'
          return exec_sql
docs: Reformats the query into the create table as query.
  
          Works only for the single select SQL statements, in all other cases
          the sql query is not modified.
          :param superset_query: string, sql query that will be executed
          :param table_name: string, will contain the results of the
              query execution
          :param overwrite, boolean, table table_name will be dropped if true
          :return: string, create table as query