How to count select distinct MySQL with 3 column

Question

I've a table like:

ID_USER USERNAME_USER REF_USER STATUS_AKTIF
1       a                      aktif
2       b             a        tidak
3       c             a        aktif
4       d             b        aktif
5       e             a        aktif

And I use this code:

select REF_USER, count(distinct USERNAME_USER) as TOTAL from TABLE where (REF_USER IS NOT NULL AND REF_USER!="" AND STATUS_AKTIF='aktif') group by REF_USER

But I only get:

REF_USER TOTAL
a        2
b        1

How I can remove b? Because user b STATUS_AKTIF is tidak

Answer 1

Simply add a group by

SELECT count(*) as total, username_user FROM table 
WHERE (REF_USER IS NOT NULL AND REF_USER!="" AND STATUS_AKTIF='aktif') 
GROUP BY username_user