主查细节的SQL查询

Question

主表包含ID和PersonName 课程表包含ID，CourseName 详细信息表包含ID，MasterID，CourseID，StartDate，EndDate

我想创建显示人员名单（PersonName）的报告以及他们采取的唯一最后一个课程（因此每个人只列出一次）：

PersonName - CourseName - StartDate - EndDate

Answer 1

select m.PersonName, c.CourseName
from   Master m
join   Detail d on d.MasterID = m.ID
join   Course c on c.ID = d.CourseID
where  d.StartDate = (select max(d2.StartDate)
                      from   Detail d2
                      where  d2.MasterID = m.ID
                     )

Answer 2

    Select personname,coursename from details 
    inner join course on course.id = details.courseid 
    inner join master on master.id = details.masterid
    inner join (select max(startdate) ,  courseid,masterid 
    from details group by masterid,courseid ) as tb1
    on tb1.courseid = details.courseid and tb1.masterid = details.masterid