MySQL获取不同域的计数

Question

I have a users table like this. Users may register from different emails ie abc@xyz.com and abc@uvw.com . I need to get the count of different domains from the email. My users table structure is

+----+------------------+------------------------+
| id | name             | email                  |
+----+------------------+------------------------+
|  3 | shamsreza        | shamsreza@abc.in       |
|  4 | Kamal            | kamalkumar@xyz.com     |
|  6 | BIBHUDATTA SAHOO | admin@uvw.com          |
|  7 | Bibhu Once Again | bibhuduttasahoo@xyz.in |
+----+------------------+------------------------+  

I queried like this

select substring(email,LOCATE('@',email),LENGTH (email)) from users

It's giving me output as

+---------------------------------------------------+
| substring(email,LOCATE('@',email),LENGTH (email)) |
+---------------------------------------------------+
| @uvw.com                                          |
| @xyz.com                                          |
| @xyz.com                                          |
| @abc.in                                           |
+---------------------------------------------------+

But here xyz.com is repeated and i need the count of distinct domains.

Answer 1

for getting distinct results, you can use DISTINCT.

select distinct substring(email,LOCATE('@',email),LENGTH (email)) from users

Or in the case you want to count them:

select count(distinct substring(email,LOCATE('@',email),LENGTH (email))) from users