Question

我正在尝试计算我正在处理的项目的免责和无理应用程序的平均值。

这是我当前的查询：

SELECT Count(unexcused) as Unexcused, Count(Points_Assigned) as Excused,
COUNT(Agent_ID) as numAgents
FROM Table1
LEFT JOIN(
    SELECT Entry_ID, Points_Assigned FROM Table2
    WHERE Points_Assigned = 0
) AS T2 USING(Entry_ID)
LEFT JOIN(
    SELECT Entry_ID, Points_Assigned as unexcused FROM Table2
    WHERE Points_Assigned > 0
) AS T3 USING(Entry_ID)
LEFT JOIN(
    SELECT Employee_ID as Agent_ID FROM Table3
    WHERE Team = 1
) AS T4 USING(Agent_ID)

哪个正确导致：

Unexcused |  Excused  |  numAgents
    12    |    14     |     69

我想使用numAgents来计算平均每个代理人的免责和无故缺席的平均值。

使用我已有的数据在一个查询中执行此操作的最佳解决方案是什么？

我尝试过(Unexcused / numAgents) AS AverageUnexcused，但收到错误。

Answer 1

你得到什么错误？你可以试试

    (Count(unexcused)/COUNT(Agent_ID)) AS AverageUnexcused.

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