如何在sql表中合并（获得总和）一些重复数据？

Question

在完成一些查询之后，我在oracle SQL开发人员身上获得了以下结果。

但我需要这样：

[]

我想将它与每个User_ID的Cash_IN和Cash_out中的总和合并。

这是我用来获得上层（第一个数字）结果的SQL查询：

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

试试这个：

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;