当我选择一个表的值
时SELECT
DATE_FORMAT(created,'%Y-%m')
,DATE_FORMAT(payday,'%Y-%m')
,SUM(IF(paid = 'S',total,0)) as total_paid_on_this_month
,SUM(IF(paid = 'N',total,0)) as total_debt_on_this_month_plus_anterior_months
FROM bills
GROUP BY DATE_FORMAT(created,'%Y-%m')
表格账单
+ ---------- + ---- + ---------- + ------ + ----- +
| created | paid | data_paid | by | total |
+ ---------- + ---- + ---------- + ------ + ----- +
| 2016-05-03 | Y | 2016-08-03 | amy | 10,00 |
| 2016-06-10 | Y | 2016-07-03 | jorge | 20,00 |
| 2016-05-20 | N | 0000-00-00 | | 5,00 |
| 2016-07-05 | N | 0000-00-00 | | 0,00 |
+ ---------- + ---- + ---------- + ------ + ----- +
我需要的是每月BILL的总和（前一个月的总额）和总支付（仅支付的月份）
示例：
one bill(10,00) was created at month 1 and paid at month 4
所以
another bill(20,00) was created at month 2 and not paid yet
我需要什么
month 1 2 3 4
paid 00,00 00,00 00,00 10,00
bill 10,00 30,00 30,00 20,00
我得到了什么
month 1 2 3 4
paid 00,00 00,00 00,00 10,00
bill 10,00 20,00 00,00 20,00
我试过
SELECT
created as Start
,total
,DATE_FORMAT(IF(paid = 'S',data_paid,CURRENT_TIMESTAMP()),'%Y-%m') as End
FROM 'Bills'
并在foreach
中的PHP上加以总结有人可以帮助我做到这一点吗？
我看到了什么：
SQL: SUM the MAX values of results returned