SQL SUM A SUM

For some reason, this was hard for me to find when I was searching, so I figured I would post here in hopes that someone
that needs it as bad as I did, comes accross it.

My primary use to a sql statement for a sum a sum is when using a count and group by within a select statement.
For instance:

1. SELECT COUNT(myvarchar_column) mycount
2. FROM tblMyTable
3. GROUP BY myvarchar_column

This returns the count of each unique string in my myvarchar_column.
but what if you want the count to be greater than 5.  Its this simple:

SELECT z.mycount
FROM
(
SELECT COUNT(myvarchar_column) mycount
FROM tblMyTable
GROUP BY myvarchar_column
) z
WHERE mycount > 5