SQL合并单元格

Question

我有这个表： T：

d：

什么我试图做的是让每个s_id所有它的符号（ DBSymbol）在一个单元格中（合并单元格）。

我发现this教程，这里是我的代码：

select T.s_id, 
    (select '; ' + D.symbol 
    from D 
    where T.D_b_id = D.id 
    FOR XML PATH('')) [DBSymbol] 
from T 

但这里是我得到：

什么是错的？

Answer 1

试试这个 -

SELECT t1.s_id, 
     STUFF(
      (SELECT '; ' + symbol AS [text()] 
       FROM (
         SELECT t.s_id, 
          d.symbol 
         FROM T 
         INNER JOIN D ON T.d_b_id = D.id 
         WHERE t.s_id = t1.s_id      
        ) x 
      FOR XML PATH('') 
      ), 1, 1, '') 
FROM T t1 
GROUP BY t1.s_id 

一下：SQL Fiddle

Answer 2

select DISTINCT T.s_id, 
Stuff((SELECT DISTINCT '; ' + D.symbol 
    from D 
    --where T.D_b_id = D.id 
    FOR XML PATH('')),1,1,'') [DBSymbol] 
from T 

例here