基于条件的SQL选择

Question

在尝试在MS Access 2016中创建以下查询时，我尝试绕过这个问题，但似乎还不够。 我的目标是执行以下操作：“列出具有15年或15年以上工作经验的Tigers每位教练的姓名和工作经验总数。” 以下是3个不同的表格：团队，教练，工作经验。 造成我最大问题的是，计算教练所拥有的所有工作经验。

查询的预期结果应产生：

教练姓名| YRS经验总数

ADAMS | 25

Answer 1

考虑：

查询1：SumExp

SELECT Sum(WorkExperience.WEXP_Yrs) AS SumOfWEXP_Yrs, WorkExperience.CoachNum
FROM WorkExperience
GROUP BY WorkExperience.CoachNum;

查询2：

SELECT WorkExperience.TeamNum, Coach.CoachName, SumExp.SumOfWEXP_Yrs
FROM 
    Coach INNER JOIN 
    (
        SumExp INNER JOIN 
        (
            Team INNER JOIN WorkExperience 
            ON Team.TeamNum = WorkExperience.TeamNum
        )
        ON SumExp.CoachNum = WorkExperience.CoachNum
    )
    ON Coach.CoachNum = SumExp.CoachNum
WHERE 
    WorkExperience.TeamNum = 24;

多合一：

SELECT WorkExperience.TeamNum, Coach.CoachName, SumExp.SumOfWEXP_Yrs
FROM 
    Coach INNER JOIN
    (
        (
            SELECT Sum(WorkExperience.WEXP_Yrs) AS SumOfWEXP_Yrs, WorkExperience.CoachNum
            FROM WorkExperience
            GROUP BY WorkExperience.CoachNum
        ) AS SumExp 
        INNER JOIN 
        (
            Team INNER JOIN WorkExperience 
            ON Team.TeamNum = WorkExperience.TeamNum
        ) 
        ON SumExp.CoachNum = WorkExperience.CoachNum
    )
    ON Coach.CoachNum = SumExp.CoachNum
WHERE 
    WorkExperience.TeamNum = 24;