[wp-hackers] SELECT DISTINCT .... ORDER BY not working....

[Stephane Daury]

Nice! But highly irregular, and definitely don't expect this to be an  
indexed query.
Although the second you start using things like group by, etc, indexes  
usually have to be manually setup (for obvious reasons), so not a big  
loss in practice I'm sure.

But hey, what counts is that you gave Guru what he was looking for,  
and that scores high as a problem solver in my book! ;-)

S



On Nov 19, 2007, at 17:01, Kimmo Suominen wrote:

> That's an interesting bug with MySQL.
>
> This seems to produce the result wanted:
>
> SELECT comment_post_id
> FROM wp_comments
> WHERE comment_approved = '1'
> GROUP BY comment_post_id
> ORDER BY MAX(comment_date) DESC
>
> Best regards,
> + Kimmo
> -- 
> <A HREF="http://kimmo.suominen.com/">Kimmo Suominen</A>
>
>
> On Mon, Nov 19, 2007 at 11:27:34PM +0200, Computer Guru wrote:
>> Nope, not working....
>>
>> Expected result:
>>
>> 493
>> 501
>> 229
>> 485
>> ....
>>
>> Actual result:
>> 501
>> 502
>> 500
>> 491
>> ....
>>
>> That's the same result I get w/ the original SELECT DISTINCT ...  
>> GROUP BY
>> query in my OP.
>>
>>
>> On 11/19/07, Aaron Brazell <emmensetech at gmail.com> wrote:
>>>
>>> This works for me...
>>>
>>> SELECT DISTINCT comment_post_id FROM wp_comments
>>>  WHERE comment_approved = '1'
>>> GROUP BY comment_id
>>> ORDER BY comment_date DESC
>>>
>>> --
>>> Aaron Brazell
>>> Director of Technology, b5media
>>>
>>> skype: technosailor
>>> phone: 410-608-6620
>>> web: http://technosailor.com
>>>
>>> Everything contained in this email is confidential and stuff
>>>
>>> On Nov 19, 2007, at 4:18 PM, Computer Guru wrote:
>>>
>>>> SELECT DISTINCT comment_post_id FROM wp_comments
>>>>  WHERE comment_approved = '1'
>>>> ORDER BY comment_date DESC
>>>
>>> _______________________________________________
>>> wp-hackers mailing list
>>> wp-hackers at lists.automattic.com
>>> http://lists.automattic.com/mailman/listinfo/wp-hackers
>>>
>>
>>
>>
>> -- 
>> Computer Guru
>> Director,
>> NeoSmart Technologies
>> http://neosmart.net/blog/
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