db2記錄去重

標籤：sel   let   having   item   date   日期   dex   select   sys   

--查出二碼，歸檔日期，借據號重複的資料的條數

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

--刪除最小的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
)

db2記錄去重