How to get the first and the last record per group in SQL Server 2008?

Question

As the title suggests, I\'d like to select the first and last row of each set of rows grouped with a GROUP BY.

I\'ve this table with the following data

Answer 1

How to two query 'UNION'

SELECT TOP 1 EmployeeId, AttendenceId, Intime
FROM EmployeeAttendence
WHERE AttendenceDate >='1/18/2020 00:00:00' 
  AND AttendenceDate <='1/18/2020 23:59:59'
GROUP BY EmployeeId,AttendenceId,Intime
ORDER BY AttendenceId  

SELECT TOP 1 EmployeeId, AttendenceId, OutTime
FROM EmployeeAttendence
WHERE AttendenceDate >='1/18/2020 00:00:00' 
  AND AttendenceDate <='1/18/2020 23:59:59'
GROUP BY EmployeeId, AttendenceId, OutTime
ORDER BY AttendenceId desc