我有两张相关数据表。
我创建了一个查询总计来自表1的经纪人的交易数量
我创建了一个Query to Total的数量" Breaks"来自表2的经纪人
然后我创建了一个Query来组合前两个查询并生成一些统计信息
示例:
Broker Total Trades Total Breaks Break %
Goldman 10 4 40%
Morgan 10 2 20%
而不是创建3个查询 - 有没有办法创建1个查询来实现相同的结果?我希望执行更详细的分析/报告,而不会通过大量的单个查询来淹没数据库。下面的SQL代码
首先查询:
SELECT DISTINCTROW [All Breaks].Broker, Sum([All Breaks].TradeCount) AS
[Sum Of TradeCount]
FROM [All Breaks]
GROUP BY [All Breaks].Broker;
第二次查询:
SELECT DISTINCTROW [All Trades].Broker, Sum([All Trades].TradeCount) AS
SumOfTradeCount
FROM [All Trades]
GROUP BY [All Trades].Broker;
结果结果:合并
SELECT [Broker List].Broker, [All Breaks Query].[Sum Of TradeCount], [All
Trades Query].SumOfTradeCount, [Sum Of TradeCount]/[SumOfTradeCount] AS
Percentage
FROM ([Broker List] INNER JOIN [All Breaks Query] ON [Broker List].Broker
= [All Breaks Query].Broker) INNER JOIN [All Trades Query] ON [Broker
List].Broker = [All Trades Query].Broker;
非常感谢!
答案 0 :(得分:0)
在查询设计中,有一种方法可以切换到SQL View,您可以在其中自由编写sql。
select one, two
from
(select one, joinfield from table1) as first
Inner join (select two, joinfield from table2) as second
ON first.joinfield = second.joinfield.