MS SQL 2005-与子查询失败订购

Question

这是真正查询的简化版本来显示问题。它可以在示例AdventureWorks数据库中执行：

SELECT Person.Address.*,
 (SELECT TOP 1 [Name]
 FROM Person.StateProvince
 WHERE Person.StateProvince.StateProvinceId = Person.Address.StateProvinceId AND Person.StateProvince.TerritoryId IN (5, 6, 7)
 ORDER BY Person.StateProvince.TerritoryId) AS [Name]
FROM Person.Address
ORDER BY [Name]

这效果很好，但是我的问题是，如果我按字段将整理添加到订单中，我会收到一个奇怪的错误消息：

SELECT Person.Address.*,
 (SELECT TOP 1 [Name]
 FROM Person.StateProvince
 WHERE Person.StateProvince.StateProvinceId = Person.Address.StateProvinceId AND Person.StateProvince.TerritoryId IN (5, 6, 7)
 ORDER BY Person.StateProvince.TerritoryId) AS [Name]
FROM Person.Address
ORDER BY [Name] COLLATE Chinese_PRC_CI_AI

错误是：

Msg 207, Level 16, State 1, Line 7
Invalid column name 'Name'.

如果没有子查询，则与“综合”子句的查询效果很好，但是我需要这样的问题（出于复杂的原因，但请相信我:)）。

有人知道为什么此查询失败了，还有什么可能是解决方法？这是一个错误吗？

谢谢！亚当

Answer 1

SQL Server不允许您按子句中的顺序中的别名引用列。例如，这行不通：

select id+1 as x from MyTable order by x

但是您可以通过重复列定义来解决此问题：

select id+1 as x from MyTable order by id+1

或使用子查询：

select * from (select id+1 as x from MyTable) as subquery order by x

就您而言，最好的解决方法可能是使用子查询：

SELECT  *
FROM    (
        SELECT  Person.Address.*
        ,       (
                SELECT  TOP 1 [Name]
                FROM    Person.StateProvince
                WHERE   Person.StateProvince.StateProvinceId = 
                            Person.Address.StateProvinceId 
                        AND Person.StateProvince.TerritoryId IN (5, 6, 7)
                ORDER BY 
                        Person.StateProvince.TerritoryId
                ) AS [Name]
        FROM    Person.Address
        ) as SubqueryAlias
ORDER BY 
        [Name]