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Retrieving the last record in each group - MySQL
...HERE rn = 1;
Below is the original answer I wrote for this question in 2009:
I write the solution this way:
SELECT m1.*
FROM messages m1 LEFT JOIN messages m2
ON (m1.name = m2.name AND m1.id < m2.id)
WHERE m2.id IS NULL;
Regarding performance, one solution or the other can be better, dep...
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jQuery: what is the best way to restrict “number”-only input for textboxes? (allow decimal points)
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TheVillageIdiotTheVillageIdiot
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