无法正确使用order by子句用于xml路径(Sql server)

Question

我有以下情况(比如tblRecord)

ID RowNum  Data
1 1  and seventy nine
1 2  five hundred
1 3  two thousand

我需要输出

ID   Data
 1   two thousand five hundred and seventy nine

我有以下查询

select ID , Data = 
  ( Select ' ' + cast(Data as varchar(max)) from tblRecord t2
                  where t2.RowNum= t1.RowNum
                  and t2.ID =t1.ID
                  order by t1.RowNum
                  for xml path(''))
from tblRecord t1
group by t1.ID

但输出是

ID  Data
1 five hundred two thousand and seventy nine

需要帮助.

谢谢

Answer 1

试试这个:

SELECT DISTINCT
    ID, Data = (SELECT ' ' + Data 
                FROM dbo.tblRecord t2
                WHERE t2.ID = t1.ID
                ORDER BY t2.RowNum DESC
                FOR XML PATH('')
               )
FROM dbo.tblRecrd t1

你的第一个问题是ORDER BY t1.RowNum内部选择 - 需要ORDER BY t2.RowNum改为.其次:这种连接条件where t2.RowNum= t1.RowNum不是必需的,会导致问题.第三:GROUP BY既不需要也不帮助 - 只需使用它SELECT DISTINCT来实现你所寻找的东西.

另外 - 不知道为什么你要Data作为VARCHAR(MAX)投射???