從一組數據中創建多個字段的彙總報告

Question

我有個任務編寫SQL來總結出如下數據：

select 
payment, 
status, 
interest, 
principal 
from payment 

---

payment status interest principal 
1  A  100   0 
2  r  0   500 
3  o  0   400 
4  d  0   100 
5  A  0   200 
6  A  200   0 
7  A  300   0 
8  A  0   300 

• 與利息支付會如果利息不爲0
• 與本金有關的付款將是本金不爲0的地方
• 需要拆分數據進入型

我找的結果與此類似：

    Interest total count   principal total count 
Status - A    3       1 
Other     0       4 
total of all payments 3       5 

我一直在使用組功能，但一直沒能超越利息金額集團。任何建議將不勝感激。

Answer 1

爲此，我建議使用GROUP BY + WITH ROLLUP。喜歡的東西：

SELECT 
    IF(`status` = 'A', 'Status A', 'Others') as `-`, 
    SUM(`interest` > 0) as `Interest total count`, 
    SUM(`principal` > 0) as `principal total count` 
FROM 
    (
     SELECT 1 as `payment`, 'A' as `status`, 100 as `interest`, 0 as `principal` 
     UNION ALL 
     SELECT 2, 'r', 0, 500 
     UNION ALL 
     SELECT 3, 'o', 0, 400 
     UNION ALL 
     SELECT 4, 'd', 0, 100 
     UNION ALL 
     SELECT 5, 'A', 0, 200 
     UNION ALL 
     SELECT 6, 'A', 200, 0 
     UNION ALL 
     SELECT 7, 'A', 300, 0 
     UNION ALL 
     SELECT 8, 'A', 0, 300 
    ) as `sub` 
GROUP BY 1 WITH ROLLUP; 

結果：

-  Interest total count principal total count 
Others   0      3 
Status A  3      2 
       3      5 

查詢：

SELECT 
    IF(`status` = 'A', 'Status A', 'Others') as `-`, 
    SUM(`interest` > 0) as `Interest total count`, 
    SUM(`principal` > 0) as `principal total count` 
FROM 
    `payment` 
GROUP BY 1 WITH ROLLUP;