Oracle - 如何通过减去子查询中的值来更新表列？

Question

此查询在触发器

上给出（ - ）错误

UPDATE CHART_ACCOUNT
SET BALANCE=BALANCE-(SELECT SUM (AMOUNT) 
                     FROM CHASH_PAYMENT_DETIALS) 
WHERE CHART_ACCOUNT.ACCOUNT_ID=CHASH_PAYMENT_DETIALS.ACCOUNT_ID

Answer 1

我相信这就是你想要的：

UPDATE CHART_ACCOUNT ca
    SET BALANCE = BALANCE - (SELECT SUM(AMOUNT)
                             FROM CHASH_PAYMENT_DETIALS cpd
                             WHERE ca.ACCOUNT_ID = cpd.ACCOUNT_ID
                            )
    WHERE EXISTS (SELECT 1
                  FROM CHASH_PAYMENT_DETIALS cpd
                  WHERE ca.ACCOUNT_ID = cpd.ACCOUNT_ID
                 );