我的查询同时具有SUM
和GROUP_CONCAT
函数时遇到问题。
和值随GROUP_CONCAT
值的增加而变化。
下面是我的代码:
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
如果实际分数是900,并且如果我在
GROUP_CONCAT
中有2个id,则实际分数是原始分数的两倍。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
实际金额的两倍,即960。
最佳答案
您的问题是您的多个ID正在使结果在分组之前的行增加一倍。您可以通过在子查询中加入所有外部数据来解决此问题。
我绝对不知道您的数据库的结构,也不知道所有的功能,但这在重新组织您的查询方面是一个黑暗的障碍。如果需要,我可以编写一个简单得多的SQLFiddle来向您展示我的意思。
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
关于mysql - 查询中Mysql SUM和GROUP_CONCAT的问题,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/31780871/