Question

I have sql server 2008 db table FILE_DETAILS in following format.

ID    FileName    Filesize_in_MB
--------------------------------
1     a.txt        5
2     b.txt        2
3     c.txt        2
3     d.txt        4
4     e.txt        6
4     f.txt        1
4     g.txt        2
5     h.txt        8
6     i.txt        7

now what i want to fetch is as bellow

ID    FileName    Filesize_in_MB
--------------------------------
1     a.txt               5
2     b.txt               2
3     c.txt;d.txt         6
4     e.txt;f.txt;g.txt   9
5     h.txt               8
6     i.txt               7

In above results what happens ID became unique key and FILENAME has get attached and separated by ; and also FILESIZE_IN_MB field in sum of group by ID

I tried with various combination like groupby + self join, also sub queries and all that
but i think i missing something.

is it possible to handle this in SQL query?

Thanks in advance

Answer 1

Try this:

SELECT  ID, 
        STUFF(( SELECT ';' + [FileName] 
                FROM FILE_DETAILS 
                WHERE ID = f.ID FOR XML PATH('')), 1, 1, ''), 
        SUM(Filesize_in_MB)
FROM    FILE_DETAILS f
GROUP BY ID

Here’s some more information:
Concatenate many rows into a single text string?