如何在SQL中获取具有相同id的列的总和？

Question

可能重复:
sql查询以对数据求和

我有以下表格结构

TradeId     TableName        PricingSecurityID  Quantity    Price   
2008        Fireball.dbo.Bond    506             50         100.0000    
2009        Fireball.dbo.Bond    506             50         100.2500    
2010        Fireball.dbo.Bond    588             50         100.7500    
2338        Fireball.dbo.Bond    588             100        102.5000    

我需要一个Quantity匹配的总和,或者我们可以说特别分组PricingSecurityID

喜欢PricingSecurityID=506我应该得到的quantity=100

因为PricingSecurityID=588我应该得到quantity=150

我该如何编写这个SQL查询？

我尝试使用简单的group by语句但是因为我也选择了tradeid我收到错误:列'TradeId'在选择列表中无效,因为它不包含在聚合函数或GROUP BY子句中.

Answer 1

修订后的问题 - 还需要TradeID.

SELECT f.TradeID, f.PricingSecurityID, s.TotalQuantity
  FROM FollowingTableStructure AS f
  JOIN (SELECT PricingSecurityID, SUM(Quantity) AS TotalQuantity
          FROM FollowingTableStructure
         GROUP BY PricingSecurityId
       ) AS s ON f.PricingSecurityID = s.PricingSecurityID

我并不完全相信这个问题是明智的,但那是你的问题.它可以很容易地扩展到处理其他表; 只需添加适当的JOIN子句.

请记住在问题中包含一个表名 - 令人惊讶的是,在不给表提供名称的情况下,问题的问题经常被提出(所以不仅是你忘记了任何方式).

重新更新的问题

因此,最初的匿名表显然是Fireball.dbo.Trade或Fireball..Trade.我可能会将11路UNION放入视图中,因为它可能会在多个地方使用.但是,忽略这一点,我们仍然可以将信息放入您的查询中:

SELECT t.TradeId, 
       ISNULL(Securities.SecurityType,'Other') SecurityType, 
       Securities.TableName,
       CASE 
       WHEN SecurityTrade.SecurityId IS NOT NULL THEN SecurityTrade.SecurityId
       ELSE Trade.SecurityId
       END AS PricingSecurityID,
       s.TotalQuantity AS Quantity,
       t.Price,
       CASE
       WHEN (t.Buy = 1 AND t.Long = 1) THEN 1
       WHEN (t.Buy = 0 AND t.Long = 0) THEN 1
       ELSE 0
       END AS Position
  FROM Fireball_Reporting..Trade AS t
  JOIN (SELECT PricingSecurityID, SUM(Quantity) AS TotalQuantity
          FROM Fireball_Reporting..Trade
         GROUP BY PricingSecurityId
       ) AS s ON t.PricingSecurityID = s.PricingSecurityID
  LEFT JOIN
       (SELECT TradeId, 'Bond' SecurityType, 'Fireball.dbo.Bond' TableName FROM Fireball..CorpBondTrade
        UNION
        SELECT TradeId, 'IRS' SecurityType, 'Fireball.dbo.Bond' TableName FROM Fireball..IRPTrade
        UNION
        SELECT TradeId, 'Treasury' SecurityType, 'Fireball.dbo.Bond' TableName FROM Fireball..TreasuryTrade
        UNION
        SELECT TradeId, 'Index' SecurityType, 'Fireball.dbo.CDSIndex' TableName FROM Fireball..CreditIndexTrade
        UNION
        SELECT TradeId, 'CDS' SecurityType, 'Fireball.dbo.CDS' TableName FROM Fireball..CDSTrade WHERE IsSovereign = 0
        UNION
        SELECT TradeId, 'Sovereign CDS' SecurityType, 'Fireball.dbo.CDS' TableName FROM Fireball..CDSTrade WHERE IsSovereign = 1
        UNION
        SELECT TradeId, 'Equity Option' SecurityType, 'Fireball.dbo.EquityOption' TableName FROM Fireball..EquityOptionTrade
        UNION
        SELECT TradeId, 'Equity' SecurityType, 'Fireball.dbo.Equity' TableName FROM Fireball..EquityTrade
        UNION
        SELECT TradeId, 'Loan' SecurityType, 'Fireball.dbo.Loan' TableName FROM Fireball..LoanTrade
        UNION
        SELECT TradeId, 'Swaption' SecurityType, 'Fireball.dbo.Bond' TableName FROM Fireball..SwaptionTrade
        UNION
        SELECT TradeId, 'Preferred Stock' SecurityType, 'Fireball.dbo.Bond' TableName FROM Fireball..PreferredEquityTrade
        --UNION
        --SELECT TradeId, 'Bond' SecurityType FROM Fireball..BondTrade
       ) AS Securities ON Securities.TradeId = t.TradeId
  LEFT JOIN
       (SELECT TradeID, SecurityId 
          FROM Fireball..CDSTrade 
        UNION
        SELECT TradeID, SecurityId 
         FROM Fireball..CreditIndexTrade          
       ) AS SecurityTrade ON SecurityTrade.TradeId = t.TradeId

这主要是复制和粘贴 - 通过一些重新格式化 - 查询,在Trade表后面的FROM子句中隐藏了额外的子查询.如果是我的查询,我也会在最后两个子查询中使用单字母(或其他短助记符)别名; 我只是没有花时间研究SecurityTrade和证券的适当缩写.

Answer 2

select PricingSecurityID, sum(Quantity)
from table
group by PricingSecurityID

Answer 3

select PricingSecurityID, sum(quantity)
from Fireball.dbo.Bond
group by PricingSecurityID

Answer 4

SELECT PricingSecurityID, SUM(ISNULL(Quantity,0))
  FROM Table
 GROUP BY PricingSecurityId;