SUM 2 2頁不同的表

-1

我有一個MySQL查詢像這樣的現場：SUM 2 2頁不同的表

SELECT SUM(bills.Amount) AS AmountExpense, SUM(assets.Amount) as AmountIncome 
FROM bills, assets where bills.UserId = 11 and assets.UserId =11

樣品紙幣表

id payee description UserId   Amount 
1 john advance   11   15.0   
2 dave request   2   13.0 
3 er  request   11   12.0

樣品資產表

id payee description UserId   Amount 
1 john advance   11   40.2   
2 dave request   2   13.0 
3 ww  request   11   14.00

我有一個問題AmountExpense，記錄SUM記錄多次。我已經獲得了金額收入。有什麼建議麼？

來源

2014-10-16 Putra L Zendrato

您可以添加一些示例數據嗎？還要說明這兩個表是如何相互關聯的。 – NMK 2014-10-16 13:33:04

在這些表的一個或兩個上，每個用戶最有可能多於一行。執行聚合後您需要加入它們。另外，請不要使用舊風格的非ANSI隱含聯接：

SELECT AmountExpense, AmountIncome 
FROM ( SELECT UserId, 
       SUM(Amount) AS AmountExpense 
     FROM bills 
     GROUP BY UserId) AS b 
LEFT JOIN (SELECT UserId, 
        SUM(Amount) AmountIncome 
      FROM assets 
      GROUP BY UserId) AS a 
    ON b.UserId = a.UserId 
WHERE b.UserId = 11

來源

2014-10-16 13:35:49 Lamak

非常感謝你... – 2014-10-16 13:40:35

如果有可能，用戶可以在任意一個表，而不是其他的，那麼你想full outer join的等價物。 MySQL不支持該語法，但它確實支持：

select userid, sum(amountexpense) as amountexpense, sum(amountincome) as amountincome 
from (select userid, amount as amountexpense, null as amountincome 
     from bills 
     union all 
     select userid, null, amount as amountincome 
     from assets 
    ) ba 
group by userid;

來源

2014-10-16 14:29:40

SUM 2 2頁不同的表

回答

相關問題