oracle 如何在Appex中使用JOIN执行UPDATE语句以计算属性[duplicate]

5us2dqdw 于 2023-02-21 发布在 Oracle

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Update statement with inner join on Oracle（15个答案）
How can I do an UPDATE statement with JOIN in Appex [duplicate]（2个答案）
51分钟前关闭。

I want to calculate the sum of value + service fees from a table booking and bill


and the table of bill
CREATE TABLE BILL (BILL_NUM ,SERVICE_FEES,TOTAL_AMOUNT 
BILL_DATE ,BOOKING_NUM number REFERENCES BOOKING(BOOKING_NUM)
)

我的预订表包含以下属性：（返回日期、预订日期、参考客户（客户 * 编号）、参考位置（位置 * 编号）、参考保险（保险 * 编号）、预订 * 编号、参考汽车（汽车注册编号）、金额）

UPDATE BILL AS A
JOIN BOOKING AS B ON A.Booking_num = B.Booking_num 
SET A.Total_Amount = B.amount + A.Service_Fees;

请帮助我修复错误

oracle

来源：https://stackoverflow.com/questions/75519561/how-can-i-do-an-update-statement-with-join-in-appex-to-calculate-to-attribute

1条答案

按热度按时间

xriantvc1#

像这样？

update bill a set
  a.total_amount = (select b.amount + a.service_fees
                    from booking b
                    where b.booking_num = a.booking_num
                   )
where exists (select null
              from booking c
              where c.booking_num = a.booking_num
             );

或者，使用merge（更简单）：

merge into bill a
  using booking b
  on (a.booking_num = b.booking_num)
when matched then update set
  a.total_amount = b.amount + a.service_fees;

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oracle 如何在Appex中使用JOIN执行UPDATE语句以计算属性[duplicate]

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