This counts how many new users there are each day. Broken down for easy graphing.
Q&A for Ubuntu users and developers
SELECT DATEADD(d, 0, DATEDIFF(d, 0, CreationDate)), COUNT(*) FROM Users GROUP BY DATEADD(d, 0, DATEDIFF(d, 0, CreationDate)) ORDER BY DATEADD(d, 0, DATEDIFF(d, 0, CreationDate))