Question

我尝试了如下所示

SELECT SUBSTRING(
       (
           SELECT td.Text + ', ' AS 'data()',
                  Tda.FirmID
           FROM   tblData1 tda
                  INNER JOIN tblData2 Td
                       ON  Tda.ID = Td.ID
           GROUP BY
                  Tda.Enable1,
                  Tda.ID,
                  Td.Text
           HAVING ISNULL(Enable1, 0) = 1
                  FOR XML PATH('')
       ),
       1,
       10000
   ) AS Csv

输出：

Landlord Tenant, <FirmID>1</FirmID>NJ Traffic, <FirmID>1</FirmID>

预期输出：应采用表格格式

       csv                          FirmID
Landlord Tenant, NJ Traffic           1

Answer 1

省略子查询中的别名并尝试：

SELECT STUFF((SELECT ', ' + td.Text
              FROM tblData2 Td 
              WHERE ISNULL(Enable1, 0) = 1
              FOR XML PATH('')
             ), 1, 2, '') AS Csv,
       MAX(Tda.FirmID)
FROM tblData1 tda;

您也无法在子查询中选择多个列。毕竟，目的是将值组合到单个列中。 select中的多个值创建一列，但字符串中包含多个XML标记。

您也不需要子查询中的group by。

Answer 2

我使用 COALESCE

得到了结果

DECLARE @Text VARCHAR(MAX) 
DECLARE @ID NUMERIC(18,0)

SELECT  @Text = COALESCE(@Text + ', ', '') + 
        CAST(td.Text AS VARCHAR(MAX)),@ID = MAX(tda.FirmID)
FROM    tblData1 tda 
        INNER JOIN tblData2  Td 
        ON Tda.ID=Td.ID 
GROUP BY 
        Tda.Enable,
        Tda.FirmID,Td.Text
HAVING ISNULL(Enable,0)=1

SELECT @Text AS Text,@ID AS ID

输出：

      text                          ID
Landlord Tenant, NJ Traffic         1

如何在sql server 2008中用逗号分隔符组合两行

2 个答案: