Peter,
Thank you for your reply.
MAX(t1.occurrence ) will pull the max of the occurrence column out of
the group, but the other collumns (like data3 or id) would still be
sorted by the GROUP BY.
I will try your second solution, but the tables I am working are
thousands of row and your solution lo
You might like to compare the performance of ...
SELECT t1.data1, t1.data2, MAX(t1.occurrence)
FROM t1
GROUP BY data1,data1
ORDER BY occurrence;
with...
SELECT t1.data1, t1.data2,t1.occurrence
FROM t1
LEFT JOIN t1 AS t2 ON t1.data1=t2.data2 AND t1.data2=t2.data2 AND
t1.occurrence < t2.occurre
Suppose I have a table:
CREATE TABLE `t1` (
`id` int(11) NOT NULL auto_increment,
`data1` varchar(50) ,
`data2` varchar(50) ,
`data3` varchar(50) ,
`occurance` datetime ,
PRIMARY KEY (`id`)
)
And I want to pull the most recent entry of each set of unique
combinations of `data1` and `d
