着人物如何總結嵌套ID表

Question

我有這樣

LEVEL_01 LEVEL_02 LEVEL_03 
---  ---   --- 
10010  10030  30010 
10010  10040  30030 
10010  10040  30040 
10020  20010  20080 
10020  10040  20080 
10020  10040  20090 
10021  20020  40000 

表並用最後一層的量的表

id   amount 
---  ------------- 
30010  100.00 
30030  190.00 
30040  800.00 
30040  700.00 
40000  250.00 
20080  320.00 
20090  500.00 

我需要的是展示從總數據三個級別，分組/嵌套級別，如：

10010->10030->30010 
10010->10040->30030 
10010->10030->30040 
------------------- 
10010=sum(30010)+sum(30030)+sum(30040)=(100.00)+(190.00)+(1500.00) = 1790.00 
10030=sum(30010)+sum(30040)=(100.00)+(1500.00) = 1600.00 
30040=sum(30040) = 1500.00 

(one record for LEVEL_10 thru LEVEL_03 and their relative sum. 

無法使其工作。任何幫助將不勝感激

Answer 1

你可以做總和的結果爲每個級別，類似於連接，然後工會：

SELECT LEVEL_01, sum(amount) 
FROM table1 INNER JOIN table2 ON table1.level_03 = table2.id 
GROUP BY LEVEL_01 
UNION ALL 
SELECT LEVEL_02, sum(amount) 
FROM table1 INNER JOIN table2 ON table1.level_03 = table2.id 
GROUP BY LEVEL_02 
UNION ALL 
SELECT LEVEL_03, sum(amount) 
FROM table1 INNER JOIN table2 ON table1.level_03 = table2.id 
GROUP BY LEVEL_03;