Sql Oderconflict

我尝试创建一个视图。我有两张像这样的桌子

ID | FileName  | PathId
----------------------
1  | Setup.exe | 2
2  | Test.doc  | 1


ID | Path      | 
----------------
1  | C:\\      | 
2  | D:\\      | 

我想按以下方式合并这两个表

 ID | FileName  | Path |Combined
 ----------------------
 1  | Setup.exe | D:\\ | D:\\Setup.exe
 2  | Test.doc  | c:\\ | C.\\Text.Doc

我的尝试如下所示：

SELECT     TOP (100) PERCENT dbo.Files.FileName, dbo.Files.PathId, dbo.Paths.Path, dbo.Paths.Path + dbo.Files.FileName AS Combined 
FROM         dbo.Files INNER JOIN dbo.Paths
 ON dbo.Files.PathID = dbo.Paths.ID
ORDER BY dbo.Files.FileName, dbo.Files.PathId, dbo.Paths.Path, Combined

这不起作用，因为Sqlserver会中止，并显示错误消息“Order BY term的第4列存在Orderconflict”

谁能帮帮我，告诉我我做错了什么？ 提前通知。

使用

SELECT     TOP (100) PERCENT dbo.Files.FileName, dbo.Files.PathId, dbo.Paths.Path, dbo.Paths.Path + dbo.Files.FileName AS Combined 
FROM         dbo.Files INNER JOIN dbo.Paths
 ON dbo.Files.PathID = dbo.Paths.ID
ORDER BY dbo.Files.FileName, dbo.Files.PathId, dbo.Paths.Path, (dbo.Paths.Path + dbo.Files.FileName );

“Combined”是在此范围内无法识别的已分配变量（别名）。其中，在下面的查询中，它将起作用，因为变量“Combined”将在范围内

SELECT FILENAME, PATHID, PATH, COMBINED FROM 
(
  SELECT     TOP (100) PERCENT dbo.Files.FileName, dbo.Files.PathId, dbo.Paths.Path, dbo.Paths.Path + dbo.Files.FileName AS Combined 
  FROM         dbo.Files INNER JOIN dbo.Paths
   ON dbo.Files.PathID = dbo.Paths.ID
  ORDER BY dbo.Files.FileName, dbo.Files.PathId, dbo.Paths.Path, (dbo.Paths.Path + dbo.Files.FileName );
) ORDER BY FILENAME, PATHID, PATH, COMBINED

---

不能在order by语句中使用别名。SQL Server还不知道组合的文件名实际上是dbo.Path.Path+dbo.Files.FileName。如果要按组合的值排序，则需要编写表列或使用公共表表达式，然后按新列排序

SELECT     TOP (100) PERCENT dbo.Files.FileName, dbo.Files.PathId, dbo.Paths.Path, dbo.Paths.Path + dbo.Files.FileName AS Combined 
FROM         dbo.Files INNER JOIN dbo.Paths
 ON dbo.Files.PathID = dbo.Paths.ID
ORDER BY dbo.Files.FileName, dbo.Files.PathId, dbo.Paths.Path, (dbo.Paths.Path + dbo.Files.FileName)

或

---

没有列

组合

而是放置现有列

dbo.Paths.Path，dbo.Files.FileName

但是，由于文件名和路径已在orderby条件中，orderby是否需要（路径+文件名）？

with cte as 
(
SELECT     TOP (100) PERCENT dbo.Files.FileName, dbo.Files.PathId, dbo.Paths.Path, dbo.Paths.Path + dbo.Files.FileName AS Combined 
FROM         dbo.Files INNER JOIN dbo.Paths
 ON dbo.Files.PathID = dbo.Paths.ID
ORDER BY dbo.Files.FileName, dbo.Files.PathId, dbo.Paths.Path, (dbo.Paths.Path + dbo.Files.FileName)
)
ORDER BY FileName, PathId, Path, Combined