How to select the last two records for each topic_id in MySQL
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by Luca Romagnoli
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Published on 2010-04-07T23:01:59Z
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2010/05/14
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Hi. I have to select the last two records for every topic.
ex: table: msg
id | topic_id
------------
1 | 1
2 | 1
3 | 1
4 | 1
5 | 2
6 | 2
7 | 2
8 | 3
9 | 3
10 | 3
I want to obtain these rows:
3 1
4 1
6 2
7 2
9 3
10 3
How can I do this?
thanks
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