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Old July 16th, 2002, 03:41 AM
EvilivE EvilivE is offline
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Help w/query ...

I created a table (help) that I am using to store msgs for a msg board. I would like to query the table to produce a result set that returns a list by most recently posted but also only one result per unique msg_num. This is what the table looks like:
Quote:
topic | msg_num | sub_num | date
------------------------------------------------------
topic 1 1 1 07-15-2002 03:16
topic 2 2 0 07-14-2002 12:45
topic 1 1 0 07-13-2002 10:00

I tried: "select distinct msg_num from help order by date desc" but that doesnt give me msg_num 1 sub_num 1 it uses msg_num 1 sub_num 0.

When a user views the board I want the most recently modified topics to be at the top of the list, much like the way this board shows posts. This way if there is a reply to an old post the query would bring it all the way to the top of the list.

Any help would be greatly appreciated.

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Old July 16th, 2002, 03:43 AM
EvilivE EvilivE is offline
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RE: Help w/query ...

Maybe this will be easier to read:
php Code:
Original - php Code
  1.  
  2. topic      | msg_num | sub_num | date
  3. ------------------------------------------------------
  4. topic_1       1         1      07-15-2002 03:16
  5. topic_2       2          0      07-14-2002 12:45
  6. topic_1       1         0      07-13-2002 10:00

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Old July 16th, 2002, 04:17 AM
Matt Matt is offline
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RE: Help w/query ...

Give this a try:

SELECT msg_num, MAX(date) from help GROUP BY msg_num

Let me know how it goes...

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Old July 16th, 2002, 09:06 AM
EvilivE EvilivE is offline
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RE: Help w/query ...

MAX, how did I forget about MAX? :rolleyes: That looks really promising I am going to try it now.

Thanks

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Old July 16th, 2002, 09:13 AM
EvilivE EvilivE is offline
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RE: Help w/query ...

Beutiful! I knew there was a reason why I hung out around here

With a little tweakin' I got it to work. Here is the final query for completeness:
select topic, msg_num, max(date) as msg_seq from help group by msg_num order by msg_seq desc

Thank you very much

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