SQL Server 2012中的列名称不明确错误

请参见以下查询

select UserStatus,UserStatus from ((Select 'Active' as UserStatus) 
 union (Select 'Inactive' as UserStatus))a order by UserStatus  

错误：

Msg 209, Level 16, State 1, Line 3
Ambiguous column name 'UserStatus'

解决方案：

ALTER DATABASE VCarePortal
SET COMPATIBILITY_LEVEL = 100

90 = SQL Server 2005`enter code here`
100 = SQL Server 2008 and SQL Server 2008 R2
110 = SQL Server 2012.

---

我试过兼容级别模式。但是我仍然得到了模糊的错误。

您选择了同一列两次，删除一列，这就解决了问题。无论如何，您不需要两次，因为每个联合的选择只返回一列

select UserStatus from ((Select 'Active' as UserStatus) 
 union (Select 'Inactive' as UserStatus))a order by UserStatus 

---

您选择同一列两次，删除一列，这就解决了问题。无论如何，您不需要两次，因为每个联合的选择只返回一列

select UserStatus from ((Select 'Active' as UserStatus) 
 union (Select 'Inactive' as UserStatus))a order by UserStatus 

---

您选择同一列两次，删除一列，这就解决了问题。无论如何，您不需要两次，因为每个联合的选择只返回一列

select UserStatus from ((Select 'Active' as UserStatus) 
 union (Select 'Inactive' as UserStatus))a order by UserStatus 

---

您选择同一列两次，删除一列，这就解决了问题。无论如何，您不需要两次，因为每个联合的选择只返回一列

select UserStatus from ((Select 'Active' as UserStatus) 
 union (Select 'Inactive' as UserStatus))a order by UserStatus 

---

请删除一个UserStatus并尝试：

select UserStatus from 
(
    (Select 'Active' as UserStatus) 
    union 
    (Select 'Inactive' as UserStatus)
)a order by UserStatus

---

请删除一个UserStatus并尝试：

select UserStatus from 
(
    (Select 'Active' as UserStatus) 
    union 
    (Select 'Inactive' as UserStatus)
)a order by UserStatus

---

请删除一个UserStatus并尝试：

select UserStatus from 
(
    (Select 'Active' as UserStatus) 
    union 
    (Select 'Inactive' as UserStatus)
)a order by UserStatus

---

请删除一个UserStatus并尝试：

select UserStatus from 
(
    (Select 'Active' as UserStatus) 
    union 
    (Select 'Inactive' as UserStatus)
)a order by UserStatus

---

在这里，当您对同一列进行排序时会产生歧义，因此sql引擎不知道需要对哪个列进行排序

所以使用下面的查询将解决您的问题

-- Order by 1 means order with first column in selection
select UserStatus, UserStatus 
from (
(Select 'Active' as UserStatus) 
 union 
 (Select 'Inactive' as UserStatus)
)a order by 1 


-- Or remove duplicate column from selection.
select UserStatus
from (
(Select 'Active' as UserStatus) 
 union 
 (Select 'Inactive' as UserStatus)
)a order by UserStatus  

---

在这里，当您对同一列进行排序时会产生歧义，因此sql引擎不知道需要对哪个列进行排序

所以使用下面的查询将解决您的问题

-- Order by 1 means order with first column in selection
select UserStatus, UserStatus 
from (
(Select 'Active' as UserStatus) 
 union 
 (Select 'Inactive' as UserStatus)
)a order by 1 


-- Or remove duplicate column from selection.
select UserStatus
from (
(Select 'Active' as UserStatus) 
 union 
 (Select 'Inactive' as UserStatus)
)a order by UserStatus  

---

在这里，当您对同一列进行排序时会产生歧义，因此sql引擎不知道需要对哪个列进行排序

所以使用下面的查询将解决您的问题

-- Order by 1 means order with first column in selection
select UserStatus, UserStatus 
from (
(Select 'Active' as UserStatus) 
 union 
 (Select 'Inactive' as UserStatus)
)a order by 1 


-- Or remove duplicate column from selection.
select UserStatus
from (
(Select 'Active' as UserStatus) 
 union 
 (Select 'Inactive' as UserStatus)
)a order by UserStatus  

---

在这里，当您对同一列进行排序时会产生歧义，因此sql引擎不知道需要对哪个列进行排序

所以使用下面的查询将解决您的问题

-- Order by 1 means order with first column in selection
select UserStatus, UserStatus 
from (
(Select 'Active' as UserStatus) 
 union 
 (Select 'Inactive' as UserStatus)
)a order by 1 


-- Or remove duplicate column from selection.
select UserStatus
from (
(Select 'Active' as UserStatus) 
 union 
 (Select 'Inactive' as UserStatus)
)a order by UserStatus  

---

你想得到什么样的结果？你期望的结果是什么。你想要两列还是一列都好？你想得到什么结果？你期望的结果是什么。你想要两列还是一列都好？你想得到什么结果？你期望的结果是什么。你想要两列还是一列都好？你想得到什么结果？你期望的结果是什么。您想要两列还是单列都可以？