如何在mysql中获得最后一种？

Question

嗨，我在mysql中有这个。

record rate update
   1      1      1
   2      1      2
   3      1      3
   4      1      4
   5      2      1
   6      2      2
   7      3      1
   8      3      2
   9      3      3

我想选择每个费率最后更新的行。

例如：

the last row of rate 1 is (4 1 4),     
the last row of rate 2 is (6 2 2)     
and the last row of rate 3 is (9 3 3). 

Answer 1

select max(record), rate, max(update)
from your_table
group by rate