SQL Server :: Sql Could Use Row_number Over For Each Group
Jan 20, 2011
select a.* from (select vip,date,amount,dense_rank() over(order by vip,date) as 'sn' from income ) a where sn = 1
vip date amount sn
0001 2010/1/1 50 1
0001 2010/1/1 10 1
0001 2010/1/6 80 2
0001 2010/1/7 90 3
0002 2010/1/2 40 4
0002 2010/1/5 10 5
0002 2010/1/5 80 5
0002 2010/1/7 90 6
would it possible give it row number for each group? (group by vip) like this
vip date amount sn
0001 2010/1/1 50 1
0001 2010/1/1 10 1
0001 2010/1/6 80 2
0001 2010/1/7 90 3
0002 2010/1/2 40 1
0002 2010/1/5 10 2
0002 2010/1/5 80 2
0002 2010/1/7 90 3
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