Question

为我的简单问题道歉，我是一个绝对的新手。我在separate queries

中有以下代码

我试图显示3列，设定工作的平均男性工资，设定工作的平均女性工资和工作ID。另外这些查询工作，但我无法弄清楚如何组合它们。我尝试过此网站的多个解决方案，例如trying to put multiple select statements inside 并且通过使用'union'解决方案然而无法工作。union这只是将它们编译成一个列并通过工资而不是JobID进行排序。

SELECT Round(Avg(Salary)) AS AverageMaleSalary, JobID
FROM Employee WHERE Gender = "M"
GROUP BY JobID;

SELECT Round(Avg(Salary)) AS AverageFemaleSalary, JobID
FROM Employee WHERE Gender = "F"
GROUP BY JobID;

Answer 1

您可以使用条件聚合

SELECT JobId,ROUND(AVG(IIF(Gender='F', Salary, NULL))) AS AverageFemaleSalary
            ,ROUND(AVG(IIF(Gender='M', Salary, NULL))) AS AverageMaleSalary
FROM Employee
GROUP BY JobId;

Access SQL无法创建两个分组平均值

1 个答案: