the below query worked great in mysql 3.23, but we just moved to 5.0 and it broke, i can see that the join rules changed in 5.0, but i can't get the right syntax to make this query work. any help would be appreciated.
On 6/28/06, Peter Brawley <[EMAIL PROTECTED]> wrote:
Tanner >I am trying to group my results by the last activity on each row, my query >looks like this >select text, dt, item_id from table >where .... >group by item_id >order by dt DESC SELECT t1.item_id, t1.dt, t1.text FROM table AS t1 LEFT JOIN table AS t2 ON t1.item_id = t2.item_id AND t1.dt < t2.dt WHERE t2.item_id IS NULL; PB ----- Tanner Postert wrote: The situation is somewhat hard to describe, so please bare with me: I am trying to group my results by the last activity on each row, my query looks like this select text, dt, item_id from table where .... group by item_id order by dt DESC here is an example record set. text1,2006-06-28 10:00:00,4 text2,2006-06-28 10:15:00,4 text3,2006-06-28 10:30:00,8 text4,2006-06-28 11:00:00,8 the results from the above query would be: text1,2006-06-28 10:00:00,4 text3,2006-06-28 10:30:00,8 my problem is that i want the other item to show up. the item with the most recent DT. it is doing the grouping before it does the ordering. how do i specify that I want to see the most recent info when it does the group? thanks in advance. Tanner ------------------------------ No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.1.394 / Virus Database: 268.9.5/377 - Release Date: 6/27/2006 No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.394 / Virus Database: 268.9.5/377 - Release Date: 6/27/2006
