使用分组将多行连接成单个文本字符串

问题描述

我有下表:tblFile

I have the following table: tblFile

我想要的输出:

我将多行连接成一个文本字符串；但是，我无法正确分组.由于代码现在它只会为 FileNameString 字段中的每个记录显示:AAA,BBB,CCC,DDD,EEE,FFF

I am Concatenating many rows into a single text string; however, I cannot get the grouping correct. As the code is now it will just display for each record in the FileNameString field: AAA,BBB,CCC,DDD,EEE,FFF

关于分组的任何建议！

SELECT FileID, Stuff(
(SELECT     N', ' + CONVERT(Varchar, FileName)
FROM         tblFile  FOR XML PATH(''),TYPE )
.value('text()[1]','nvarchar(max)'),1,2,N'')AS FileNameString
From tblFile
GROUP BY FileID

推荐答案

试试这个 -

SELECT DISTINCT
      fileid
    , STUFF((
        SELECT N', ' + CAST([filename] AS VARCHAR(255))
        FROM tblFile f2
        WHERE f1.fileid = f2.fileid ---- string with grouping by fileid
        FOR XML PATH (''), TYPE), 1, 2, '') AS FileNameString
FROM tblFile f1

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