更新設置爲從選擇錯誤語法

Question

我試着使用更新設置像上面，我嘗試不同的語法，但沒有成功

update 
pc_discount 
set 
ceza_ucret_turu_id=pc_discount_ceza.CEZA_ALT_UCRET_KODU 
from 
(select CEZA_ALT_UCRET_KODU from pc_discount_ceza where CEZA_ALT_UCRET_KODU is not null) pdc 
where 
pc_discount.id=pdc.discount_id 
ceza_ucret_turu_id is null 

第一次沒有成功（SQL命令未正確結束）

MERGE INTO pc_discount pd 
    USING pc_discount_ceza pdc 
    ON pd.id = pdc.discount_id 
    AND pdc.CEZA_ALT_UCRET_KODU is not null 
    and pd.ceza_ucret_turu_id is null 
WHEN MATCHED THEN 
UPDATE 
    SET ceza_ucret_turu_id = pdc.CEZA_ALT_UCRET_KODU 

再次失敗（缺少ON關鍵字）

是否有任何建議來運行那種sql？

編輯：

update 
pc_discount 
set 
ceza_ucret_turu_id=pdc.CEZA_ALT_UCRET_KODU 
from 
(select CEZA_ALT_UCRET_KODU from pc_discount_ceza where CEZA_ALT_UCRET_KODU is not null) pdc 
where 
pc_discount.id=pdc.discount_id and 
ceza_ucret_turu_id is null 

依然沒有改變。

Answer 1

有一對夫婦的事情，我會改變

• 有兩個條件，他們需要一個「和」 SET加盟應該
• 使用表的別名在集合
• 添加加盟條件設定爲子查詢

嘗試像

update 
    pc_discount 
set 
    ceza_ucret_turu_id = pcd.CEZA_ALT_UCRET_KODU 
from 
    ( 
    select 
     discount_id, 
     CEZA_ALT_UCRET_KODU 
    from 
     pc_discount_ceza 
    where 
     CEZA_ALT_UCRET_KODU is not null 
) pcd 
where 
    pc_discount.id = pcd.discount_id and 
    pc_discount.ceza_ucret_turu_id is null 

Answer 2

試試這個 - 我不知道你使用正確的語法用於Oracle

UPDATE pc_discount pd 
SET ceza_ucret_turu_id = 
(SELECT 
    MAX(ceza_alt_ucret_kodu) 
    FROM 
    pc_discount_ceza pdc 
    WHERE pd.id = pdc.discount_id 
) 
WHERE pd.ceza_ucret_turu_id IS NULL 
; 

以上已與新的業務規則更新