Oracle 兩表更新 報錯ORA-01779: 無法修改與非鍵值保存表對應的列

 

--用B表字段更新A表字段
UPDATE (
select a.is_work iswork from dim_time a ,(select date_num,is_rest
 from WORKTIME_SPECIALDAY@oa ) b where a.fdate = b.date_num and b.IS_REST !=0 --order by a.fdate
)t
set t.iswork =1;

報錯:

 

 

原因：B表去更新A表字段，在A表和B表關聯的時候，B表date_num不是主鍵或date_num字段沒有設置唯一鍵，導致B表date_num里有重復數據

解決辦法：

　　第一種：修改業務數據，使date_num數據唯一

　　第二種：寫一個視圖(DIM_WORKTIME_SPECIALDAY)，去重之后再更新

select distinct to_date(date_num,'yyyy-mm-dd hh24:mi:ss') as date_num, is_rest
 from WORKTIME_SPECIALDAY where IS_REST =0 and org_account_id ='670869647114347'

UPDATE (
select a.is_work iswork from dim_time a ,(select date_num,is_rest 
 from DIM_WORKTIME_SPECIALDAY ) b where a.fdate = b.date_num and b.IS_REST !=0 order by a.fdate
)t
set t.iswork =1;