如何設置由聚合函數detemined到列

Question

我使用Oracle Apex.I創建了一列平均設定值它的價值

UPDATE emp 
SET avg = SUM(price) 
OVER (PARTITION BY id)/COUNT(DISTINCT date) OVER(PARTITION BY id); 

我一直在使用聚合函數成功地生成我想要的價值，但我無法將其設置爲Column.Suggest如何我可以將我的查詢結果設置爲列。

Answer 1

通過讓所有的數據到CTE和基於ID更新，關於EMP表

假定腳本：

在Oracle：

MERGE INTO EMP U 
using (
SELECT ID 
       , SUM(price) OVER (PARTITION BY id)/COUNT(DISTINCT date) OVER(PARTITION BY id) AS Rnum 
     FROM EMP 
) S 
on (u.id = s.id) 
when matched then update set U.Avg = S.rnum 

在SQL Server

;WITH number AS (
     SELECT ID 
       , SUM(price) OVER (PARTITION BY id)/COUNT(DISTINCT date) OVER(PARTITION BY id) AS Avg 
     FROM EMP 

    ) 
    UPDATE t 
    SET  t.Avg = r.Avg 
    FROM Emp t 
      JOIN number r ON t.ID = r.ID;