如何合併（與獲取總和）在sql表中的一些重複的數據？

Question

在完成一些查詢後，我的oracle SQL開發人員得到了下面的結果。

但我需要得到這樣的：

[]

我想在Cash_IN和Cash_out每個USER_ID獲取和合並。

這是我用得到上（第一圖）結果的SQL查詢：

SELECT User_ID, Cash_In, Cash_out 
FROM (SELECT wa.User_ID, count(tt.ID) Cash_In, 0 Cash_out 
     FROM mwt_wallet_transactions t, mwt_txn_types tt, mwt_user_wallet wa 
     WHERE t.txn_code = tt.ID and 
     t.a_number = wa.id and 
     tt.ID = '1' 
     GROUP BY wa.User_ID) 

UNION ALL 

SELECT User_ID, Cash_In, Cash_out 
FROM (SELECT wa.User_ID, 0 Cash_In, count(tt.ID) Cash_out 
     FROM mwt_wallet_transactions t, mwt_txn_types tt, mwt_user_wallet wa 
     WHERE t.txn_code = tt.ID and 
     t.a_number = wa.id and 
     tt.ID = '2' 
     GROUP BY wa.User_ID) 
ORDER BY User_ID; 

Answer 1

試試這個：

SELECT User_ID, Cash_In, Cash_out 
FROM 
(SELECT wa.User_ID, count(case when tt.ID = '1' then 1 else null end) Cash_In, 
     count(case when tt.ID = '2' then 1 else null end) Cash_out 
FROM mwt_wallet_transactions t, mwt_txn_types tt, mwt_user_wallet wa 
WHERE t.txn_code = tt.ID and 
t.a_number = wa.id 
GROUP BY wa.User_ID) 
ORDER BY mobile_no;