是否可以将 TOP N WITH TIES 与 Union 一起使用？

Question

我试图在他们各自的表中找到任务最多的管家和向导，我试图用联合来显示一个结果，但我收到这个错误：

“如果没有相应的 ORDER BY 子句，则不允许使用 TOP N WITH TIES 子句。”

SELECT TOP 1 with ties e.EmpID as 'EmployeeID', Count(ScheduleID) as 'Task Count'
FROM EMPLOYEE e, CLEANING c
where e.empid = c.hkid
group by e.empid
UNION
SELECT TOP 1 with ties e.EmpID as 'EmployeeID', Count(ResID) as 'Task Count'
FROM EMPLOYEE e, RESERVATION r
where e.empid = r.guideid
group by e.empid
order by 'Task Count' desc

Answer 1

试试这个：

SELECT *
FROM
(
    SELECT TOP 1 with ties e.EmpID as 'EmployeeID', Count(ScheduleID) as 'Task Count'
    FROM EMPLOYEE e, CLEANING c
    where e.empid = c.hkid
    group by e.empid
    order by [Task Count] desc
)  DS
UNION
SELECT *
FROM
(
    SELECT TOP 1 with ties e.EmpID as 'EmployeeID', Count(ResID) as 'Task Count'
    FROM EMPLOYEE e, RESERVATION r
    where e.empid = r.guideid
    group by e.empid
    order by [Task Count] desc
) DS

或这个：

SELECT SELECT TOP 1 with ties EmployeeID, [Task Count]
FROM
(
    SELECT e.EmpID as 'EmployeeID', Count(ScheduleID) as 'Task Count'
    FROM EMPLOYEE e, CLEANING c
    where e.empid = c.hkid
    group by e.empid
    UNION
    SELECT ties e.EmpID as 'EmployeeID', Count(ResID) as 'Task Count'
    FROM EMPLOYEE e, RESERVATION r
    where e.empid = r.guideid
    group by e.empid
    
) DS
order by [Task Count] desc