需求：按月份统计查询合同金额，回款金额
按月份统计查询合同金额，回款金额,按时间倒序排列
注：合同表：base_contract
回款表：base_actual
select DATE_FORMAT(PERSONNEL_DATE,'%Y-%m') as diffDate,
ifnull(sum(case when 1=1 then amount else 0 end),0) as amount,0 as hkamount
from base_contract
group by DATE_FORMAT(PERSONNEL_DATE,'%Y-%m')
union all
select DATE_FORMAT(receive_date,'%Y-%m') receiveDate,
0,ifnull(sum(case when 1=1 then amount else 0 end),0) as hkamount
from base_actual
group by DATE_FORMAT(receive_date,'%Y-%m')
order by diffDate desc
比较讨论：
select a.diffDate,MAX(a.amount) as amount, MAX(a.hkamount) as hkamount
from
(select DATE_FORMAT(PERSONNEL_DATE,'%Y-%m') as diffDate,
ifnull(sum(case when 1=1 then amount else 0 end),0) as amount,0 as hkamount
from base_contract
group by DATE_FORMAT(PERSONNEL_DATE,'%Y-%m')
union all
select DATE_FORMAT(receive_date,'%Y-%m') receiveDate,
0,ifnull(sum(case when 1=1 then amount else 0 end),0) as hkamount
from base_actual
group by DATE_FORMAT(receive_date,'%Y-%m')
)a
GROUP BY a.diffDate
order by diffDate desc
来自 “ ITPUB博客 ” ，链接：https://blog.itpub.net/2505/viewspace-2804011/ ，如需转载，请注明出处，否则将追究法律责任。
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