A quick guess, or at least a starting point: SELECT key, data FROM myTable GROUP BY key LIMIT 2
HTH, Arthur On Sat, Dec 3, 2011 at 11:41 AM, Blog Tieng Viet <blogtiengv...@yahoo.com>wrote: > Hellow everybody. > > I have a problem difficult for me, please give me an advice. > > I want to get a specific number of entry (rows) from a table > by each Key. If the number is 1, I can use "select dinstinct", > but the number is not 1, I don't know how to select. > > For example: > > Key 0 | data 0-0 > Key 0 | data 0-1 > Key 0 | data 0-2 > Key 1 | data 1-0 > Key 1 | data 1-1 > > I want to select 2 data for each key. > Key 0 (data 0-0, data 0-1), Key 1 (data 1-0, data 1-1). > > How to describe in query ? > > Best regards. >
