首先，我查看了类似的问题，但没有找到适合我的情况的问题。我转成sql的访问代码如下（不是我写的）
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));
我已将其变成以下内容，但标题中出现错误：
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