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

SELECT 
    substring_index(email_address, '@', -1) AS Domain 
   ,COUNT(*) AS MyCount
FROM 
    database_name.table_name
GROUP BY 
    substring_index(email_address, '@', -1)
ORDER BY
    MyCount DESC

Answer 2

Small tweak to Wolph's original above to shorten a bit and add nice column name and limit results in case list is long. Adjust limit to your own liking

select substring_index(email, '@', -1) AS domain, count(*) from TABLE group by domain order by count(*) DESC limit 40;

Answer 3

select distinct SUBSTRING(Email, CHARINDEX('@', Email) + 1,LEN(Email) - CHARINDEX ('@', Email)), Count(*) from Tbl_name
Group by SUBSTRING(Email, CHARINDEX('@', Email) + 1,LEN(Email) - CHARINDEX ('@', Email))
order by Count(*) desc

Answer 4

Adding ORDER BY to WoLpH's answer makes the output more clear:

SELECT substring_index(email, '@', -1), COUNT(*) AS MyCount
FROM `database`.`table`
GROUP BY substring_index(email, '@', -1)
ORDER BY MyCount DESC;

Answer 5

You can use this query to get Unique count of domain from table.

SELECT substr(email,INSTR(email,"@")+1),count(substr(email,INSTR(email,"@"))) from YOUR_TABLE group by substr(email,INSTR(email,"@"));

Answer 6

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;