@classmethod
def __insert_into(cls, table: str=None, **kwargs) ->str:
    """        Build insert statement.

        :param table:
            target table name from the data base

        :return
            MySQL insert statement
        """
    cols = ','.join(['%s'] * len(kwargs)) % tuple(kwargs.keys())
    vals = []
    for v in kwargs.values():
        if v != 'NULL' and isinstance(v, str):
            vals = vals + [f"'{v}'"]
        else:
            vals = vals + [str(v)]
    vals = ','.join(vals)
    que = f'INSERT INTO {table} ({cols}) VALUES ({vals})'
    return que
