添加列選擇*

Question

在SQL Server中我用來做這樣的事情額外列添加到選擇：

select *, 
     case 
     when w1.start_date < w2.start_date then 
      to_date(w2.START_date, 'DD/MM/YYYY') - 1 
     else 
     to_date(w1.end_date, 'DD/MM/YYYY') 
     end as end_date_modified 
from WEIGHTED_AVERAGE w1 

然而，繼甲骨文導致「ORA-00923 FROM關鍵字未找到預期」 ：

select *, 
     case 
     when w1.start_date < w2.start_date then 
      to_date(w2.START_date, 'DD/MM/YYYY') - 1 
     else 
     to_date(w1.end_date, 'DD/MM/YYYY') 
     end end_date_modified 
from WEIGHTED_AVERAGE w1 

我搜遍了所有，但無法弄清楚如何在Oracle中實現這一點。

Answer 1

試試這個

select w1.*, 
     case 
     when w1.start_date < w2.start_date then 
      to_date(w2.START_date, 'DD/MM/YYYY') - 1 
     else 
     to_date(w1.end_date, 'DD/MM/YYYY') 
     end end_date_modified 
from WEIGHTED_AVERAGE w1 

Answer 2

修改你的SELECT開始到W1。*