SUM of grouped COUNT in SQL Query

Question

I have a table with 2 fields:

ID  Name
--  -------
1   Alpha
2   Beta
3   Beta
4   Beta
5   Charlie
6   Charlie

I want to group them by name, with \'co

Answer 1

all of the solution here are great but not necessarily can be implemented for old mysql servers (at least at my case). so you can use sub-queries (i think it is less complicated).

 select sum(t1.cnt) from 
        (SELECT column, COUNT(column) as cnt
            FROM
            table 
            GROUP BY 
            column
            HAVING 
            COUNT(column) > 1) as t1 ;