MySQL How to select domain name from email address ?

SELECT 
   COUNT(*) as cnt, SUBSTR(SUBSTR(Email, INSTR(Email, '@'), INSTR(Email, '.')), 2) as domain 
FROM 
   Users 
GROUP BY domain 
ORDER BY cnt DESC

SELECT COUNT(*) as cnt, SUBSTR(SUBSTR(Email, INSTR(Email, '@'), INSTR(Email, '.')), 2) as domain FROM Users GROUP BY domain ORDER BY cnt DESC