Issue with Mysql SUM and GROUP_CONCAT in query - mysql

Question

I am having issue with my query having both SUM and GROUP_CONCAT function.
The sum values changes as GROUP_CONCAT values increases.
Below is my code:
SELECT ul.display_name,
ul.photo,
ul.user_id,
Sum(ulr.level_score) AS level_scores,
Sum(ulr.level_timer) AS level_timer,
Group_concat(ulr.level_completed) AS levels,
Group_concat(DISTINCT c.bit_id) AS bit_id
FROM user_level_responses AS ulr
INNER JOIN user_login AS ul
ON (
ul.user_id=ulr.user_id)
INNER JOIN c_member AS cm
ON (
cm.user_id=ul.user_id
AND cm.user_approval='Y'
AND cm.delete_status='0'
AND cm.status='1')
INNER JOIN ctree ct
ON (
cm.circuit_id=ct.circuit_id )
INNER JOIN cir AS c
ON (
c.circuits_id=cm.circuit_id
AND c.builtin=0
AND c.delete_status='0'
AND c.status='1')
WHERE Match(ct.circuit_path) against ('_902_')
AND ulr.institution_id=321
AND ulr.delete_status=0
AND ulr.status=1
AND ul.delete_status=0
GROUP BY ulr.user_id
ORDER BY level_scores DESC,
level_timer ASC,
ul.display_name limit 500
If the actual score is 900 and if i have 2 ids in GROUP_CONCAT then actual score is double the original.
Expected OUTPUT:
user1 2010.cs,btech 960 00:01:08 Completed
user2 btech 920 00:01:08 Completed
OUTPUT GETTING:
user1 2010.cs,btech 1920 00:01:08 Completed
user2 btech 920 00:01:08 Completed
twice the actual amount ie 960.

Answer 1

Your problem is that your multiple ids are doubling the rows that your result has before the grouping. You can solve this problem by joining in all of the external data in a subquery.
I have absolutely no idea the structure of your database, nor all of the functions, but this is a stab in the dark at reorganizing your query. If you need, I can write up a much simpler SQLFiddle to show you what I mean.
SELECT ul2.display_name,
ul2.photo,
ul2.user_id,
Sum(ulr.level_score) AS level_scores,
Sum(ulr.level_timer) AS level_timer,
Group_concat(ulr.level_completed) AS levels,
ul2.bit_id
FROM user_level_responses AS ulr
INNER JOIN (
SELECT
ul.display_name,
ul.photo,
ul.user_id,
GROUP_CONTACT(DISTINCT c.bit_id) as bit_id
FROM user_login AS ul
INNER JOIN c_member AS cm
ON (
cm.user_id=ul.user_id
AND cm.user_approval='Y'
AND cm.delete_status='0'
AND cm.status='1')
INNER JOIN ctree ct
ON (
cm.circuit_id=ct.circuit_id )
INNER JOIN cir AS c
ON (
c.circuits_id=cm.circuit_id
AND c.builtin=0
AND c.delete_status='0'
AND c.status='1')
WHERE Match(ct.circuit_path) against ('_902_')
AND ul.delete_status=0
GROUP BY ul.user_id
) AS ul2
ON (
ulr.user_id = ul2.user_id )
WHERE ulr.institution_id=321
AND ulr.delete_status=0
AND ulr.status=1
GROUP BY ulr.user_id
ORDER BY level_scores DESC,
level_timer ASC,
ul.display_name limit 500