在MySQL中合并具有最大ID和最小ID的行
[英]Combine rows with max id and min id in MySQL
问题描述
Hi I have this table that save Entrance Employees 
嗨，我有此表保存入职员工
IO_Id Employee_Id EnterDate EnterTime ExitDate ExitTime
--------------------------------------------------------------------------
1 1 11/20/2018 08:00 11/20/2018 09:00
2 1 11/20/2018 09:10 11/20/2018 09:20
3 1 11/20/2018 09:30 11/20/2018 10:00
4 2 11/20/2018 09:30 11/20/2018 11:00
5 1 11/21/2018 10:00 11/21/2018 11:30
How i can select this result that any row have firstEnterTime , fistExitTime , LastEnterTime, LastExitTime for all date and all Employees 我如何选择任何行都具有针对所有日期和所有员工的firstEnterTime，fistExitTime，LastEnterTime，LastExitTime的结果
IO_Id Employee_Id EnterDate firstEnterTime fistExitTime LastEnterTime LastExitTime
----------------------------------------------------------------------------------------------------------
1 1 11/20/2018 08:00 09:00 09:30 10:00
4 2 11/20/2018 09:30 11:00 09:30 11:00
5 1 11/21/2018 10:00 11:30 10:00 11:30
1 个解决方案
解决方案1
0 已采纳 2018-11-24 06:31:10
You can try below using min() and max() aggregation 您可以在下面尝试使用min（）和max（）聚合
select min(IO_Id) as IO_Id,Employee_Id,EnterDate as first_EnterDat,
min(EnterTime) as first_EnterTime,min(ExitTime) as fistExitTime,max(EnterTime) as last_EnterTime,max(ExitTime) as lasEtxitTime
from tablename
group by Employee_Id,EnterDate
order by IO_Id
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