简单的查询复制在SQL Server

Question

我需要过滤根据以下要求查询..

我的查询：

select * from tbltemp 

电流输出：

Caterogy SeqCategory DescofChange RequestId  TaskCompVer 
-----------------------------------------------------------------------------  
BIGBEAR BIGBEAR  BIGBEAR   B14020002  Provide ASPM Wish List 
ARCUS3PL KOJN-RE  ARCUS3PL  B14020002  Provide ASPM Wish List 
AURORA  Aurora  Aurora   B14020003  Provide ASPM Wish List 

所需的输出：

Caterogy   SeqCategory  DescofChange  RequestId TaskCompVer 
---------------------------------------------------------------------------------------  
BIGBEAR,ARCUS3PL BIGBEAR,KOJN-RE BIGBEAR,ARCUS3PL B14020002 Provide ASPM Wish List 
AURORA    Aurora   Aurora   B14020003 Provide ASPM Wish List 

我是如何来筛选这样的方式在上述选择查询它所产生的实际输出..

我尝试使用的东西，但它抛出语法错误：

SELECT 
    RequestId, 
    STUFF((SELECT ', ' + temp2.WishItemPE 
      FROM tbltemp temp2 
      WHERE temp2.TaskCompVer = temp1.TaskCompVer 
      AND temp2.RequestId = temp1.RequestId   
      FOR XML PATH('')), 1, 1, '') AS WishItemPE 
FROM 
    tbltemp 

错误：

Incorrect syntax near 'XML'

Answer 1

您可以使用stuff功能：

select distinct stuff(
    (select cast(',' as varchar(max)) + t1.Category 
    from temp t1 
    WHERE t1.RequestID = t.RequestID 
    order by t1.Category 
    for xml path('') 
    ), 1, 1, '') as Category, 

stuff(
    (select cast(',' as varchar(max)) + t1.SeqCategory 
    from temp t1 
    WHERE t1.RequestID = t.RequestID 
    order by t1.SeqCategory 
    for xml path('') 
    ), 1, 1, '') as SeqCategory, 
stuff(
    (select cast(',' as varchar(max)) + t1.DescofChange 
    from temp t1 
    WHERE t1.RequestID = t.RequestID 
    order by t1.DescofChange 
    for xml path('') 
    ), 1, 1, '') as DescofChange, 
    RequestID, 
stuff(
    (select Distinct cast(',' as varchar(max)) + t1.TaskProvider 
    from temp t1 
    WHERE t1.RequestID = t.RequestID 

    for xml path('') 
    ), 1, 1, '') as TaskProvider 
from temp t 

demo here：http://sqlfiddle.com/#!3/f1789/9

编辑 对此可替代的可能是CROSS APPLY：

SELECT Categories, SeqCategories, DescofChanges, RequestID, TaskProvider 
FROM temp as A 
Cross Apply 
(
SELECT Category + ',' 
FROM temp AS B 
WHERE A.RequestID = B.RequestID FOR XML PATH('') 
)D (Categories) 
Cross Apply 
(
SELECT SeqCategory + ',' 
FROM temp AS B 
WHERE A.RequestID = B.RequestID FOR XML PATH('') 
)E (SeqCategories) 
Cross Apply 
(
SELECT DescofChange + ',' 
FROM temp AS B 
WHERE A.RequestID = B.RequestID FOR XML PATH('') 
)F (DescofChanges) 

GROUP BY RequestID, Categories, SeqCategories, DescofChanges, TaskProvider 

演示：http://sqlfiddle.com/#!3/f1789/56

Answer 2

首先，为什么出错，

1.You没有指定基表的表别名。查询中的最后一行。

FROM 
tbltemp temp1 
     ^here 

2.有表tbltemp与列名WishItemPE没有列。线路号码3.

最后，你必须使用下面的查询来获得所需的输出。

STUFF((SELECT ', ' + temp2.WishItemPE 

最终查询

SELECT distinct 
    STUFF((SELECT ', ' + temp2.[Caterogy] 
      FROM tbltemp temp2 
      WHERE temp2.TaskCompVer = temp1.TaskCompVer 
      AND temp2.RequestId = temp1.RequestId  
      FOR XML PATH('')), 1, 1, '') AS [Caterogy], 
    RequestId, 
    STUFF((SELECT ', ' + temp2.[SeqCategory] 
      FROM tbltemp temp2 
      WHERE temp2.TaskCompVer = temp1.TaskCompVer 
      AND temp2.RequestId = temp1.RequestId  
      FOR XML PATH('')), 1, 1, '') AS [SeqCategory], 
    STUFF((SELECT ', ' + temp2.[DescofChange] 
      FROM tbltemp temp2 
      WHERE temp2.TaskCompVer = temp1.TaskCompVer 
      AND temp2.RequestId = temp1.RequestId  
      FOR XML PATH('')), 1, 1, '') AS [DescofChange], 
    [TaskCompVer] 
FROM 
    tbltemp as temp1 

SQL Fiddle