Alternate Way

Hi,

I have a table with values in a column

10
10
10
20
25
20
30
20
20

Q:  I want to retrieve the values with single count i.e, 25,30. And I want to accomplishwithout using group by and having clause.

i am excited to find other alternative way using rank functions. Please help me.

Thanks in advance

Regards, SVR