各種範圍的計數和總和

Question

我想獲得以下範圍的計數和總和（10-20,21-30,31-40）。我如何修改此查詢來獲取？

select count (t.aaa), sum (t.bbb) 
from xxx t 
where t.qqq IN ('3') 
and t.www like 'A' 
and t.eee >= TO_DATE('2008/03/20','YYYY/MM/DD') 
and t.eee <= TO_DATE('2009/03/21','YYYY/MM/DD') 
and t.ttt >= 10 and t.ttt <= 20 

輸出應該是這個樣子：

╔════════╦══════════════╦════════════╗ 
║ TRANGE ║ COUNT(t.aaa) ║ SUM(t.bbb) ║ 
╠════════╬══════════════╬════════════╣ 
║ 10-20 ║   340 ║ 4981620000 ║ 
║ 21-30 ║   239 ║ 3999425000 ║ 
║ 31-40 ║   199 ║ 4076525000 ║ 
╚════════╩══════════════╩════════════╝ 

Answer 1

這聽起來像你可能會t.www和每個範圍要組。一個案例可以將每個數字轉換爲一個範圍值，然後可以在該組中使用。

SELECT CASE 
    WHEN t.ttt BETWEEN 10 AND 20 THEN '10-20' 
    WHEN t.ttt BETWEEN 21 AND 30 THEN '21-30' 
    ELSE '31-40' END TRange 
    , count(t.aaa), sum(t.bbb) 
FROM xxx t 
WHERE t.qqq IN ('3') 
AND t.www IN ('A','B','C','D') 
AND t.eee >= TO_DATE('2008/03/20','YYYY/MM/DD') 
AND t.eee <= TO_DATE('2009/03/21','YYYY/MM/DD') 
AND t.ttt BETWEEN 10 AND 40 
GROUP BY CASE 
    WHEN t.ttt BETWEEN 10 AND 20 THEN '10-20' 
    WHEN t.ttt BETWEEN 21 AND 30 THEN '21-30' 
    ELSE '31-40' END; 

SQLFiddle.