Question

我创建了如下表

RegID - primary key
Confattid - foreign key
membchoiceid - foreign key and a multivalue field
tourId - foreign key and a multivalue field

其余类似于下面的查询：

所有付费字段均为货币格式。

我尝试将所有费用字段计算为新字段名称“total”。即使我编写查询，它也不显示任何错误，但在运行查询时它没有显示结果。

我的疑问：

SELECT ConferenceRegisterFee.RegID, 
       ConferenceRegisterFee.ConfStateRegFeePaid, 
       ConferenceRegisterFee.ConfSpouFeePaid, 
       ConferenceRegisterFee.ConfAttMembDuesPaid, 
       ConferenceRegisterFee.ConfLateFeePaid, 
       ConferenceRegisterFee.ConfRegFeePaid, 
       ConferenceRegisterFee.ConfAttMembDuesPaid, 
       [confstateregfeepaid]+[confspoufeepaid]+[confattmembduespaid]+[conflatefeepaid]+[confregfeepaid] AS total
FROM ConferenceRegisterFee
GROUP BY ConferenceRegisterFee.RegID, 
         ConferenceRegisterFee.ConfStateRegFeePaid, 
         ConferenceRegisterFee.ConfSpouFeePaid, 
         ConferenceRegisterFee.ConfAttMembDuesPaid, 
         ConferenceRegisterFee.ConfLateFeePaid, 
         ConferenceRegisterFee.ConfRegFeePaid, 
         ConferenceRegisterFee.ConfAttMembDuesPaid;

我是新来的。你们有什么想法可以帮我解决这个问题吗？

Answer 1

非常感谢你的帮助。我已经可以运行查询，因为我忘记了NULL值。

我的查询：选择ConferenceRegisterFee.RegID，ConferenceRegisterFee.ConfStateRegFeePaid，ConferenceRegisterFee.ConfSpouFeePaid，ConferenceRegisterFee.ConfAttMembDuesPaid，ConferenceRegisterFee.ConfLateFeePaid，ConferenceRegisterFee.ConfRegFeePaid，NZ（[ConferenceRegisterFee] [ConfStateRegFeePaid]！）+ NZ（[ConferenceRegisterFee]！[ConfSpouFeePaid]）+ NZ（[ ConferenceRegisterFee]！[ConfAttMembDuesPaid]）+ NZ（[ConferenceRegisterFee]！[ConfLateFeePaid]）+ NZ（[ConferenceRegisterFee]！[ConfRegFeePaid]）AS Total 来自ConferenceRegisterFee;

再次感谢

计算访问中的一个或多个字段

1 个答案: