Oracle分析函數可能嗎？

Question

想知道是否有人有關於如何使用任何oracle分析函數重新編寫此sql的建議。 Oracle版本11gR2。提前致謝。

SELECT SUB_SEGMENT, 
SUM(
CASE 
    WHEN (TRANSACTION_MONTH = TO_CHAR(SYSDATE, 'MM')) 
    AND (TRANSACTION_YEAR = (TO_CHAR(SYSDATE, 'YYYY'))) 
    THEN TRAN_AMOUNT 
    ELSE 0 
END) AS MTD, 
SUM(
CASE 
    WHEN (TRANSACTION_MONTH = TO_CHAR(ADD_MONTHS(SYSDATE, -1), 'MM')) 
    AND (TRANSACTION_YEAR = (TO_CHAR(ADD_MONTHS(SYSDATE, -1), 'YYYY'))) 
    THEN TRAN_AMOUNT 
    ELSE 0 
END) AS MONTH6, 
SUM(
CASE 
    WHEN (TRANSACTION_MONTH = TO_CHAR(ADD_MONTHS(SYSDATE, -2), 'MM')) 
    AND (TRANSACTION_YEAR = (TO_CHAR(ADD_MONTHS(SYSDATE, -2), 'YYYY'))) 
    THEN TRAN_AMOUNT 
    ELSE 0 
END) AS MONTH5, 
SUM(
CASE 
    WHEN (TRANSACTION_MONTH = TO_CHAR(ADD_MONTHS(SYSDATE, -3), 'MM')) 
    AND (TRANSACTION_YEAR = (TO_CHAR(ADD_MONTHS(SYSDATE, -3), 'YYYY'))) 
    THEN TRAN_AMOUNT 
    ELSE 0 
END) AS MONTH4, 
SUM(
CASE 
    WHEN (TRANSACTION_MONTH = TO_CHAR(ADD_MONTHS(SYSDATE, -4), 'MM')) 
    AND (TRANSACTION_YEAR = (TO_CHAR(ADD_MONTHS(SYSDATE, -4), 'YYYY'))) 
    THEN TRAN_AMOUNT 
    ELSE 0 
END) AS MONTH3, 
SUM(
CASE 
    WHEN (TRANSACTION_MONTH = TO_CHAR(ADD_MONTHS(SYSDATE, -5), 'MM')) 
    AND (TRANSACTION_YEAR = (TO_CHAR(ADD_MONTHS(SYSDATE, -5), 'YYYY'))) 
    THEN TRAN_AMOUNT 
    ELSE 0 
END) AS MONTH2, 
SUM(
CASE 
    WHEN (TRANSACTION_MONTH = TO_CHAR(ADD_MONTHS(SYSDATE, -6), 'MM')) 
    AND (TRANSACTION_YEAR = (TO_CHAR(ADD_MONTHS(SYSDATE, -6), 'YYYY'))) 
    THEN TRAN_AMOUNT 
    ELSE 0 
END) AS MONTH1 
FROM TRAN_TYPE 
WHERE INCOMING_OUTGOING = 'I' 
GROUP BY SUB_SEGMENT 
ORDER BY DECODE(SUB_SEGMENT, 'Premium Plus', 1, 'Premium', 2, 'Upper Mass', 3); 

Answer 1

解決方案 -試試這個以下輸出

select * from 

(select count(1) payments, trunc(transaction_date,'MM') month_ from 
(select level * 12 + 11024294 payment_id, 
case when round(11 * level * dbms_random.value) < 400 then round(11 * level * dbms_random.value) * 20 
    when round(11 * level * dbms_random.value) < 800 then round(11 * level * dbms_random.value) * 3 
    else round(11 * level * dbms_random.value) end amount, 
case when mod(level,2) = 0 or mod(level,2) = 3 then 'Premium Plus' 
    when mod(level,2) = 5 or mod(level,3) = 1 then 'Premium' 
    else 'Upper Mass' 
end sub_segment, 
to_date(round (dbms_random.value (1, 28)) 
     || '-' 
     || round (dbms_random.value (7, 12)) 
     || '-' 
     || round (dbms_random.value (2014, 2014)), 
     'DD-MM-YYYY') 
transaction_date 
from dual tran_type 
connect by level <= 20000) transaction_data 
group by trunc(transaction_date,'MM')) 

pivot(max(payments) as payments for month_ in 
('01-Jul-14' as jul14, '01-Aug-14' as aug14, '01-Sep-14' as sep14, 
'01-Oct-14' as oct14, '01-Nov-14' as nov14, '01-Dec-14' as dec14)); 

解決方案擴展 -

select * from (select * from 

(select count(1) payments, trunc(transaction_date,'MM') month_ from 
(select level * 12 + 11024294 payment_id, 
case when round(11 * level * dbms_random.value) < 400 then round(11 * level * dbms_random.value) * 20 
    when round(11 * level * dbms_random.value) < 800 then round(11 * level * dbms_random.value) * 3 
    else round(11 * level * dbms_random.value) end amount, 
case when mod(level,2) = 0 or mod(level,2) = 3 then 'Premium Plus' 
    when mod(level,2) = 5 or mod(level,3) = 1 then 'Premium' 
    else 'Upper Mass' 
end sub_segment, 
to_date(round (dbms_random.value (1, 28)) 
     || '-' 
     || round (dbms_random.value (7, 12)) 
     || '-' 
     || round (dbms_random.value (2014, 2014)), 
     'DD-MM-YYYY') 
transaction_date 
from dual tran_type 
connect by level <= 20000) transaction_data 
group by trunc(transaction_date,'MM')) 

pivot(max(payments) as payments for month_ in 
('01-Jul-14' as jul14, '01-Aug-14' as aug14, '01-Sep-14' as sep14, 
'01-Oct-14' as oct14, '01-Nov-14' as nov14, '01-Dec-14' as dec14))) 

unpivot(num_of_pmt for month in ("JUL14_PAYMENTS" as 'Jul-14', 
"AUG14_PAYMENTS" as 'Aug-14', 
"SEP14_PAYMENTS" as 'Sep-14', 
"OCT14_PAYMENTS" as 'Oct-14', 
"NOV14_PAYMENTS" as 'Nov-14', 
"DEC14_PAYMENTS" as 'Dec-14'));