db2记录去重

Posted 2020-10-13 有的事，必须自己去领悟~

--查出二码，归档日期，借据号重复的数据的条数

select default_index_item_id,record_date,index_yxdk_dkjjh,min(sys_org_id),max(sys_org_id), min(submit_time),max(submit_time),count(index_yxdk_id),
min(index_yxdk_id),max(index_yxdk_id)
from index_yxdk_tb
group by default_index_item_id,record_date,index_yxdk_dkjjh
having count(index_yxdk_id) > 1

--查看最小ID
select min(index_yxdk_id)
from index_yxdk_tb
group by default_index_item_id,record_date,index_yxdk_dkjjh
having count(index_yxdk_id) > 1

--删除最小的ID

delete from index_yxdk_tb where index_yxdk_id in (
select min(index_yxdk_id)
from index_yxdk_tb
group by default_index_item_id,record_date,index_yxdk_dkjjh
having count(index_yxdk_id) > 1
)