oracle转换数字

to_number(                                                                                                             ) as month_Id
                to_char(trunc(                                                                        ),'yyyymm')
                                     to_date(                                                ),'mm'
                                                   to_char(                 ),'yyyymmdd'
                                                               rmr.time_id

to_number(to_char(trunc(to_date(to_char(rmr.time_id),'yyyymmdd'),'mm'),'yyyymm')) as month_Id

2022-12-23
2021-10-06
2021-04-23
2021-11-16
2022-02-24
2022-12-23