oracle业务优化求助,在组合分区表中求本月与上月重复部分

with cur_month as

(select *

from CUST_SFM_JYCRMEPC_LIST

where mold = '302'

and create_time >=

to_date(to_char(sysdate, 'yyyy/mm') || '/01', 'yyyy-mm-dd')

and create_time <

to_date(to_char(last_day(sysdate), 'yyyy/mm/dd'), 'yyyy-mm-dd') + 1),

pre_month as

(select *

from CUST_SFM_JYCRMEPC_LIST

where mold = '302'

and create_time >=

to_date(to_char(ADD_MONTHS(sysdate, -1), 'yyyy/mm') || '/01',

'yyyy-mm-dd')

and create_time <

to_date(to_char(last_day(ADD_MONTHS(sysdate, -1)), 'yyyy/mm/dd'),

'yyyy-mm-dd') + 1)

insert /*+append parallel(t,4)*/ --月新增

into CUST_SFM_JYCRMEPC_LIST t

select PROVICE_CODE,

MDN,

IMSI,

PAYMENT_MODE_CD,

PROD_INST_STATE,

STATE_TIME,

REGION,

EMDN,

EIMSI,

EPAYMENT_MODE_CD,

EPROD_INST_STATE,

ESTATE_TIME,

EREGION,

302B mold,

sysdate CREATE_TIME

from (select PROVICE_CODE,

MDN,

IMSI,

PAYMENT_MODE_CD,

PROD_INST_STATE,

STATE_TIME,

REGION,

EMDN,

EIMSI,

EPAYMENT_MODE_CD,

EPROD_INST_STATE,

ESTATE_TIME,

EREGION

from cur_month

minus

select PROVICE_CODE,

MDN,

IMSI,

PAYMENT_MODE_CD,

PROD_INST_STATE,

STATE_TIME,

REGION,

EMDN,

EIMSI,

EPAYMENT_MODE_CD,

EPROD_INST_STATE,

ESTATE_TIME,

EREGION

from pre_month)

CUST_SFM_JYCRMEPC_LIST 该表示组合分区表，以CREATE_TIME

为主分区， mold 为子分区，我要实现的业务是，用 CUST_SFM_JYCRMEPC_LIST表中本月的减去上月的，求出新增的，然后将新增的插入到 CUST_SFM_JYCRMEPC_LIST 表， 请教一下有什么比较好的方法不用写的这么累呢