MySQL Query to Count Unique Domains from Email Address field

Question

I\'d like to get a better idea of what domains my customers are using. I could easily do this in PHP by explodeing each address and counting the domain that way

Answer 1

You would have to do something like this:

SELECT substring_index(email, '@', -1) domain, COUNT(*) email_count
FROM table
GROUP BY substring_index(email, '@', -1)

-- If you want to sort as well:
ORDER BY email_count DESC, domain;