SQL Group Function - mysql

Question

I was trying to get count of three columns by using SUM(), when I execute the query, it says '#1111 - Invalid use of group function'. I tried correcting the group functions, even though it shows the error.
I need the perfect count of columns 2,3,4
SELECT c.name,
SUM(CASE WHEN COUNT(distinct cmc.id) = COUNT(distinct ccc.id) THEN 1 ELSE 0 END) AS "COND1",
SUM(CASE WHEN COUNT(distinct cmc.id) > 0 AND COUNT(distinct cmc.id) != COUNT(distinct ccc.id) THEN 2 ELSE 0 END) AS "COND2",
SUM(CASE WHEN COUNT(distinct cmc.id) = 0 THEN 3 ELSE 0 END) AS "COND3"
FROM
lesson_modules_completion cmc
INNER JOIN lesson_modules cm ON cmc.lessonmoduleid = cm.id
INNER JOIN lesson_completion_settings ccc ON cm.lesson = ccc.lesson
INNER JOIN lesson c ON cm.lesson = c.id
INNER JOIN user u ON u.id = cmc.userid
WHERE ccc.criteriatype=4
GROUP BY c.name
I need the count of each user has Completed modules, Inprocess modules and Notstarted modules for each course, where getting the count of userids from table CC by taking courseia from table CM, get number of modules that an user has completed from each course.
(A course can have morethan one module and a course can have number of users attempted all modules, few modules or not attempted at all).
So, I need number of users - has done number of modules - in a course. (3 logics)
(COND1 i.e.,Completed.Users ) : If number of modules attempted is equal to number of modinstance from table CMS (ex: no. of modules attempted by a user per course= 9, no.modinstance = 9. Because 7 is not equal to 9, They are completed.)
(COND2 i.e.,Inprocess.Users ) : Number of modules attempted should be >0, but not equal to [count(modinstance) per course] (ex: no. of modules attempted by a user per course= 7 , no.modinstance = 9. Because 7 is not equal to 9, They are Inprocess.)
(COND2 i.e.,Nostart.Users ) : Number of modules attempted should be equal to 0, (ex: no. of modules attempted by a user per course= 0. They are Notstarted).
You can refer my query, It was all doing good, but I need the count of COND1, COND2, COND3
I need the OUTPUT :
lesson COND1 COND2 COND3
5 65 32 6
6 40 12 15
8 43 56 0
9 0 7 9

Answer 1

select lesson,sum(COND1) as COND1, sum(COND2) as COND2,sum(COND3) as COND3
from
(
SELECT c.name,
ccc.lesson,
CASE WHEN COUNT(distinct cmc.id) = COUNT(distinct ccc.id) THEN 1 ELSE 0 END AS "COND1",
CASE WHEN COUNT(distinct cmc.id) > 0 AND COUNT(distinct cmc.id) != COUNT(distinct ccc.id) THEN 2 ELSE 0 END AS "COND2",
CASE WHEN COUNT(distinct cmc.id) = 0 THEN 3 ELSE 0 END AS "COND3"
FROM
lesson_modules_completion cmc
INNER JOIN lesson_modules cm ON cmc.lessonmoduleid = cm.id
INNER JOIN lesson_completion_settings ccc ON cm.lesson = ccc.lesson
INNER JOIN lesson c ON cm.lesson = c.id
INNER JOIN user u ON u.id = cmc.userid
WHERE ccc.criteriatype=4
GROUP BY c.name,ccc.lesson
) t
group by lesson