多部分標識符不能綁定在更新查詢中

Question

首先我看了類似的問題，但沒有找到我的情況。 我會變得SQL訪問代碼如下（我沒有寫它）

UPDATE QUpdateTrialstepApproved1 
INNER JOIN TrialStepApproved ON 
QUpdateTrialstepApproved1.cid_req = TrialStepApproved.cID 
SET TrialStepApproved.wm21 = [wm2_req], 
TrialStepApproved.sw = [startweek_req], 
TrialStepApproved.PlannedTotalm2 = [m2_req], 
TrialStepApproved.ew = [endweek_req], 
TrialStepApproved.ActualNrofDiffEntries = [entries_req], 
TrialStepApproved.entryfactorTrial1 = [eFtrial_req], 
TrialStepApproved.fixeddeliveryweek = [fixedEndweek_req], 
TrialStepApproved.culturename = [culturename_req] 
WHERE (((QUpdateTrialstepApproved1.approveRequestChange)="v") 
AND ((TrialStepApproved.Location) Is Not Null)); 

我已經把它變成下面，但我得到的錯誤標題：

UPDATE A 
SET B.wm21 = [wm2_req], 
B.sw = [startweek_req], 
B.PlannedTotalm2 = [m2_req], 
B.ew = [endweek_req], 
B.ActualNrofDiffEntries = [entries_req], 
B.entryfactorTrial1 = [eFtrial_req], 
B.fixeddeliveryweek = [fixedEndweek_req], 
B.culturename = [culturename_req] 
from QUpdateTrialstepApproved1 as A 
INNER JOIN TrialStepApproved as B ON A.cid_req = B.cID 
WHERE A.approveRequestChange='v' AND B.Location Is Not Null 

Answer 1

您正在更新B，而不是A。將第一行改爲

UPDATE B 

......事情會正常工作。

An SQLfiddle。