Question

我有一个查询，可以通过名称和大小获取重复。名称将由用户定义的函数splitFilePath1(Filepath)检索，其中Filepath是表的列.Below是我的查询

 SELECT Filepath,splitFilePath1(t1.Filepath) FROM Filemanager t1 INNER JOIN (SELECT splitFilePath1(Filepath),Size FROM Filemanager GROUP BY splitFilePath1(Filepath), Size HAVING COUNT(*) > 1) t2 ON t1.Size = t2.Size AND t1.splitFilePath1 = t2.splitFilePath1

错误：找不到t1.splitFilePath1。

编辑1：

SELECT splitFilePath1(Filepath) FROM Filemanager t1 INNER JOIN (SELECT Size,splitFilePath1(Filepath) FROM Filemanager GROUP BY splitFilePath1(Filepath),Size HAVING count(*) > 1) t2 ON splitFilePath1(t1.Filepath)= splitFilePath1(t2.Filepath) AND t1.Size=t2.Size

错误：找不到文件路径。

Answer 1

猜猜在查询结尾处t1.splitFilePath1应该替换为splitFilePath1(t1.Filepath)。我认为该表没有列

Answer 2

在您的（第一个）查询中，t2不是表而是子查询，因此只有当该列出现在该SELECT列表中时，才能访问列t2.xxx。

要访问splitFilePath1(Filepath)的值，请为其命名：

SELECT Filepath,
       splitFilePath1(t1.Filepath)
FROM Filemanager t1
INNER JOIN (SELECT splitFilePath1(Filepath) AS splitFilepath,
                   Size
            FROM Filemanager
            GROUP BY splitFilePath1(Filepath),
                     Size
            HAVING COUNT(*) > 1) t2
ON t1.Size = t2.Size AND
   splitFilePath1(t1.Filepath) = t2.splitFilepath

在重复查询中找不到用户定义的函数

2 个答案: