数据库出现重复怎么解决，求大神 急急急

Question

select distinct '2016-3',m3.po_num,m3.item_num,max(m3.item_desc) over(partition by m3.po_num, m3.item_num, m3.vendor_num, m3.unit_price_with_tax) as item_desc,
m3.vendor_num,
m3.vendor_name,m3.unit_price_with_tax,m3.unit_price,m3.tax_rate,
m3.ph_creation_date d1,m3.pll_last_update_date d2,
sum(m3.po_real_qty) over(partition by m3.po_num, m3.item_num, m3.vendor_num, m3.unit_price_with_tax) po_real_qty,
sum(m3.PRIMARY_QUANTITY) over(partition by m3.po_num, m3.item_num, m3.vendor_num, m3.unit_price_with_tax) PRIMARY_QUANTITY,
m3.pk_buyer,m3.usdflag,m3.new_price_rate,0
from

(select mv.*,/*rcv.rcv,*/
(select sum(decode(r.transaction_type, 'RECEIVE', 1, -1) * r.QUANTITY)
from epms_erp_rcvqty_info r
where r.LINE_LOCATION_ID = '417100'
and r.rcv_date >= to_date('2016-1-26','yyyy-MM-dd')
and r.rcv_date < to_date('2016-2-26','yyyy-MM-dd')
and r.transaction_type in ('RETURN TO VENDOR', 'RECEIVE')) as PRIMARY_QUANTITY
from po_price_view_mv mv/*,(select r.rcv_date as rcv
from epms_erp_rcvqty_info r
where r.LINE_LOCATION_ID = '417100'
and r.rcv_date >= to_date('2016-1-26','yyyy-MM-dd')
and r.rcv_date < to_date('2016-2-26','yyyy-MM-dd')
and r.transaction_type in ('RETURN TO VENDOR', 'RECEIVE')) rcv*/
where (mv.ph_creation_date >= to_date('2016-1-26','yyyy-MM-dd') and mv.ph_creation_date < to_date('2016-2-26','yyyy-MM-dd') )
or (mv.pll_last_update_date >=to_date('2016-1-26','yyyy-MM-dd') and mv.pll_last_update_date < to_date('2016-2-26','yyyy-MM-dd') ) ) m3

Answer 1

加 group by 分组函数吧