sort entire row

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Rahul
Rahul 2012-6-4
I have
a= 3 16
6 22
2 6
1 25
4 4
I need to sort 2nd column and keep the entire matrix according to sort of second column
i wan the output as
b=4 4
2 6
3 16
6 22
1 25

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the cyclist
the cyclist 2012-6-4
b = sortrows(a,2);

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