我有以下数据库设计。表格是:
auth_user
----------
first_name
last_name
staffuser
----------
phone_number
user_id
billing_customerservicebill
-----------------------------
bill_id
service_provider_id
discounted_price
billing_billmanagement
------------------------
creation_date
我的查询按行返回每个用户的 discounted_price 总和。我需要每个月的记录显示在列中。 下面的查询给我 This record
select a.service_provider_id, first_name, Sum(a.discounted_price), EXTRACT(MONTH FROM c.creation_date)
from billing_customerservicebill a
left outer join users_staffuser b
on a.service_provider_id = b.id
left outer join billing_billmanagement c
on a.bill_id = c.id
left outer join auth_user d
on d.id = b.user_id
where c.creation_date between '2017-11-01' AND '2017-12-31'
group by service_provider_id, first_name, EXTRACT(MONTH FROM c.creation_date)
order by 1
My data show in Table Currently
service_provider_id | first_name | Sum | Month
5 | suneel 31500 | 11
5 | Suneel | 900 | 12
Expected data is
service_provider_id | first_name | Nov | December
5 | suneel | 31500 | 900
最佳答案
最灵活的方法是使用条件聚合...
select
a.service_provider_id,
first_name,
SUM(CASE WHEN c.creation_date >= '2017-11-01' AND c.creation_date < '2017-12-01' THEN a.discounted_price END) AS nov,
SUM(CASE WHEN c.creation_date >= '2017-12-01' AND c.creation_date < '2018-01-01' THEN a.discounted_price END) AS dec
from billing_customerservicebill a
left outer join users_staffuser b
on a.service_provider_id = b.id
left outer join billing_billmanagement c
on a.bill_id = c.id
left outer join auth_user d
on d.id = b.user_id
where c.creation_date between '2017-11-01' AND '2017-12-31'
group by service_provider_id, first_name
order by 1
这表明您需要提前知道要计算哪些列。
关于mysql - SQL JOIN, GROUP BY 四张表获取按月记录,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/48678138/