Question

我有以下代码 -

declare @userType int
declare @custIdOfUser int

select 
    @userType = UserTypeId, @custIdOfUser = CustomerId 
from 
    customers c with (nolock)
left outer join 
    Sites s with (nolock) on c.CustomerId = s.CustomerId 
left outer join 
    customers rc on rc.CustomerId = c.ResellerId 
where 
    c.[name] is not null 
    and (c.customerId is null or rc.CustomerId = c.CustomerId) 
    and c.IsActive != ''
    and (@userType = 1 OR @userType = 2 OR 
           (c.customerId in ((SELECT u.CustomerId, ur.RoleId 
                              FROM Users u
                              INNER JOIN UserRoles ur ON ur.UserId = u.UserId AND ur.RoleId = 39
                              INNER JOIN Customers c ON ur.CustomerId = c.CustomerID 
                              WHERE u.UserId = 28 or u.UserTypeId = 3 or u.UserTypeId = 4 
                                and c.customerId in 
                                    (SELECT c.CustomerId FROM Customers c 
                                     WHERE c.resellerId = u.CustomerId )))))

它给了我以下错误消息 -

Msg 116，Level 16，State 1，Line 10
  当子查询未与EXISTS一起引入时，只能在选择列表中指定一个表达式   Msg 207，Level 16，State 1，Line 3
  列名称无效＆＃39; UserTypeId＆＃39;。
  Msg 209，Level 16，State 1，Line 3
  不明确的列名称＆＃39; CustomerId＆＃39;。

Answer 1

不明确的列名'CustomerId'

你得到这个是因为你选择了CustomerId而没有指定从哪个表中取出它。此列名存在于您的3个表（UserRoles，Sites和Customers）上，其中一个您要加入两次（Customers c和Customers rc ）。你应该使你的select语句更明确，例如。
```
select 
  @custIdOfUser = c.CustomerId
```
无效的列名称'UserTypeId'

您的任何表格中都不存在此列。
当未使用EXISTS
引入子查询时，只能在选择列表中指定一个表达式

- 因为你有这个：
```
c.customerId in ((SELECT u.CustomerId, ur.RoleId 
```
应该是这样的：
```
c.customerId in ((SELECT u.CustomerId
```

不明确的列名称'CustomerId'

1 个答案: