Question

I have three table like this:

manga

|   id  | sendby
------------------
|   1   |   1
|   2   |   1
|   3   |   1
|   4   |   1

chaprer

|   id  | sendby    | translator | graphic
-------------------------------------------
|   1   |   1       |   admin    |  other
|   2   |   1       |   admin    |  other
|   3   |   1       |   admin    |  admin
|   4   |   1       |   other    |  admin

user

|   userid  | username  
-----------------------
|      1    |   admin       

I’m trying to count what ever i have sent, but the result is not correct.

i have tried below query:

SELECT username,
   SUM(
       CASE WHEN m.sendby = u.userid
       THEN 1 ELSE 0 END
   ) AS manga,
   SUM(
       CASE WHEN c.sendby = u.userid
       THEN 1 ELSE 0 END
   ) AS chapter,
   SUM(
       CASE WHEN c.translator = u.username
       THEN 1 ELSE 0 END
   ) AS translator,
   SUM(
       CASE WHEN c.graphic = u.username
       THEN 1 ELSE 0 END
   ) AS graphic
FROM user u
    left JOIN manga m 
        ON m.sendby = u.userid 
    left JOIN chapter c 
        ON c.sendby = u.userid 
where u.userid = '1'

but it’s return this which is not correct:

manga : 16,
chapter : 16,
translator : 12,
graphic : 8

Answer 1

Here is the query for this

select
  m.id,
  count(m.sendby) as Manga,
  lc.Chapter,
  rc.Translater,
  c.Grafix
from manga as m
  left join (select sendby, count(sendby) as Chapter from chaprer) as lc on lc.sendby  = m.sendby
  left join (select sendby, count(translater) as Translater from chaprer where translater = 'admin') as rc on rc.sendby  = m.sendby
  left join (select sendby, count(graphics) as Grafix from chaprer where translater = 'admin') as c on c.sendby  = m.sendby

EDITS
I have tested this query and this fetches this result

Query Result
id  Manga   Chapter Translater  Grafix
1   4       4       3           3