MySQL中所有公司的貿易總和[刪除]

Question

我想找出具有最大資本[價格*數量]的公司（包括該公司在整個表格中的所有條目）。有什麼建議麼？

我已經做到了這一點：

SELECT symbol, SUM(amount*price) AS total 
FROM orders 
GROUP BY symbol 

Answer 1

您的查詢應該是這樣的。

SELECT symbol,SUM(amount*price) AS total FROM orders GROUP BY symbol order by total desc limit 1; 

我加入限制1，因爲你想找出最大資本的公司。

Answer 2

如果FETCH FIRST WITH TIES支持：

SELECT symbol, SUM(amount*price) AS total 
FROM orders 
GROUP BY symbol 
ORDER BY total DESC 
FETCH FIRST 1 ROW WITH TIES 

如果不是：

SELECT symbol, SUM(amount*price) AS total 
FROM orders 
GROUP BY symbol 
HAVING SUM(amount*price) = (SELECT SUM(amount*price) AS total 
          FROM orders 
          GROUP BY symbol 
          ORDER BY total DESC 
          LIMIT 1)