Question

我有很多解决方案可以用逗号合并值。我有一些用逗号合并id的棘手要求。我在桌子上有大约10列。例如。

     declare  @t1 TABLE (id INT, NAME VARCHAR(MAX), address1 varchar(max), mobileno varchar(max));
     INSERT @t1 values (1,'100',null,'1111111111');
     INSERT @t1 values (2,'100','pune','1111111111');
     INSERT @t1 values (3,'200',null,null);
     INSERT @t1 values (4,'300','pune',null);
     INSERT @t1 values (5,'200',null,'1111111111');

    SELECT 
    STUFF((
    SELECT ','+CAST(ID AS VARCHAR(10)) [text()] 
    FROM @t1 as B
    WHERE B.NAME = A.NAME
    FOR XML PATH('')),1,1,'') as ID, NAME, address1, mobileno
    FROM @t1 as A
   GROUP BY NAME, address1, mobileno

例如。

ID | Value
---+-------
 1 | 100
 2 | 100
 3 | 200  
 4 | 200
 5 | 300

我需要输出

ID | Value
---|------
1,2| 100
3,4| 200
  5| 300

Answer 1

--sample table:
WITH ABC
AS
(
SELECT '1' as ID, '100' as value

UNION 

SELECT '2' as ID, '100' as value

UNION 

SELECT '3' as ID, '200' as value

UNION 

SELECT '4' as ID, '200' as value

UNION 

SELECT '5' as ID, '300' as value


)
--Expected query:
SELECT 
STUFF((
SELECT ','+ID 
FROM ABC as B
WHERE B.Value = A.Value
FOR XML PATH('')),1,1,'') as ID, Value
FROM ABC as A
GROUP BY Value

--Desired output:
    ID  Value
    1,2 100
    3,4 200
    5   300

请注意： ','+ ID必须确保ID在VARCHAR或类似的字符串类型中，否则需要在正常工作之前进行转换。

逗号分隔的ID列具有相同的值

1 个答案: