我想使用MS Access SQL更新具有ID主键的表tblBillingPlan
。我想用我通过查询在组中计算出的值更新字段db_FeeType
。MS Access UPDATE查询失败,因为查询不可更新
FROM子句引用qryGIT,它返回两列ID和FeeType。每个ID只返回一行。
UPDATE tblBillingPlan
SET tblBillingPlan.db_FeeType =
(SELECT MAX(GI.FeeType)
FROM qryGIT AS GI
WHERE GI.id=tblBillingPlan.ID
GROUP BY GI.ID
);
当我运行时出现错误“查询不可更新”。我怎样才能解决这个问题?
我最初尝试:
UPDATE tblBillingPlan
SET tblBillingPlan.db_FeeType =
(SELECT GI.FeeType
FROM qryGIT AS GI
WHERE GI.id=tblBillingPlan.ID
);
这里是
SELECT Billing_plan.id
, Billing_plan.name
, IIf(Max([Fee]) Is Null Or Max([Fee])=Min([Fee])
,Max([Fee])
,"BP has BP Fee rows with different fee types") AS FeeType
FROM Billing_plan
LEFT JOIN Billing_plan_fee
ON Billing_plan.id = Billing_plan_fee.billing_plan_id
GROUP BY Billing_plan.id, Billing_plan.name;
注意Billing_plan_fee
将匹配给定Billing_plan.id多达四个行定义。
我也尝试使用TOP修改只返回这没有什么区别
UPDATE tblBillingPlanCPLAD
SET tblBillingPlanCPLAD.FeeType =
(SELECT TOP 1 GI.FeeType -- TOP 1 made no differentce
FROM GITAS GI
WHERE GI.id=tblBillingPlan.ID
);
我对这个使用DAO记录做一个行,但我敢肯定,我以前写的SQL可以在Oracle和SQL服务器中执行此操作。我生锈了。
“Billing_plan”和“Billing_plan_fee”表或视图? –