SQL Server 2016最大分区中的select语句不起作用

Question

我试图通过语句分区返回分组集的最小和最大日期时间。分钟线有效，但最大值返回未分组结果的最大日期。 SQL Server 2016.我错过了什么？

SELECT 
    [temp_Emp], [temp_EmpID], [temp_Date], [Temp_Start], [Temp_End], 
    MIN(Temp_Start) OVER (PARTITION BY temp_EmpID, temp_Date ORDER BY Temp_Start, Temp_End) AS 'Start', 
    MAX(Temp_End) OVER (PARTITION BY temp_EmpID, temp_Date ORDER BY Temp_Start, Temp_End) AS 'End' 
FROM 
    tmp_startend 

结果：

temp_EmpID temp_Date Temp_Start Temp_End Start End 
300 7/08/2017 7/08/2017 8:00 7/08/2017 8:15 7/08/2017 8:00 7/08/2017 8:15 
300 7/08/2017 7/08/2017 8:15 7/08/2017 8:30 7/08/2017 8:00 7/08/2017 8:30 
300 7/08/2017 7/08/2017 9:00 7/08/2017 10:00 7/08/2017 8:00 7/08/2017 10:00 
300 7/08/2017 7/08/2017 9:15 7/08/2017 14:30 7/08/2017 8:00 7/08/2017 14:30 
300 7/08/2017 7/08/2017 9:30 7/08/2017 14:00 7/08/2017 8:00 7/08/2017 14:30 
300 7/08/2017 7/08/2017 10:00 7/08/2017 13:00 7/08/2017 8:00 7/08/2017 14:30 
300 7/08/2017 7/08/2017 10:00 7/08/2017 14:30 7/08/2017 8:00 7/08/2017 14:30 
300 7/08/2017 7/08/2017 14:00 7/08/2017 15:00 7/08/2017 8:00 7/08/2017 15:00 

Answer 1

离开了order by。这使得值累计：

SELECT [temp_Emp], [temp_EmpID],[temp_Date],[Temp_Start],[Temp_End], 
     min(Temp_Start) over (partition by temp_EmpID, temp_Date) as [Start], 
     max(Temp_End) over (partition by temp_EmpID, temp_Date) as [End] 
FROM tmp_startend; 

的min()刚刚发生的工作，因为order by把最小值第一 - 所以累积min()相同的整体min()。