[DB-SIG] Strange resultset with ORDER BY col1, GROUP BY col2

Chris Cogdon chris at cogdon.org
Fri Jun 24 17:14:00 CEST 2005

On Jun 24, 2005, at 4:19 AM, Andy Todd wrote:

> - Do you need to do the group_concat transposition in SQL or would  
> it be
> better achieved in Python after you've select all of the group,  
> comment
> pairs from the database?

If you're grouping a particular column, you MUST use some kind of  
aggregate function on that column (eg, sum, max, or the mysql  
specific group_concat).

The alternative is to retrieve N times more rows and do the grouping  
and concatenation in python, which is inefficient. What Kolbe trying  
to do should work just fine.

    ("`-/")_.-'"``-._        Chris Cogdon <chris at cogdon.org>
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