How to select the same field twice with different conditions and display results as separate fields

Question

I want to create a Table Adapter in C# as follows.

I wish to use same filed in a table twice with different conditions, and it must be shown as two diff

Answer 1

 SELECT A.StudentID, A.Studname, A.StudSex, A.StudCourse, 
SUM(CASE WHEN A.AttendStatus = 'Present' THEN 1 ELSE 0 END) AS TotalPresent,
SUM(CASE WHEN A.AttendStatus = 'Absent' THEN 1 ELSE 0 END) AS TotalAbsent
FROM AttendanceReg A 
INNER JOIN LocalTable L ON A.StudCourse = L.AttendCourse AND DatePart('M', A.DateOfAttendance) = L.AttentMonth)

GROUP BY A.StudentID, A.Studname, A.StudSex, A.StudCourse

Answer 2

Finally I have Solved This Issue, Thanks To @Ikram Turgunbaev :)

Here Is the Code

SELECT AttendanceReg.StudentID,AttendanceReg.Studname, AttendanceReg.StudSex,
AttendanceReg.StudCourse,
SUM(IIf( AttendanceReg.AttendStatus = 'Present', 1,0)) AS TotalPresent,
SUM(IIf( AttendanceReg.AttendStatus = 'Absent', 1,0)) AS TotalAbsent, 
DatePart('m', AttendanceReg.DateOfAttendance) AS MYMONTH

FROM (AttendanceReg
    INNER JOIN LocalTable ON
    AttendanceReg.StudCourse = LocalTable.AttendCourse 
    AND 
    DatePart('m', AttendanceReg.DateOfAttendance) = LocalTable.AttentMonth)

GROUP BY AttendanceReg.StudentID, AttendanceReg.Studname,
    AttendanceReg.StudSex, AttendanceReg.StudCourse,
    DatePart('m', AttendanceReg.DateOfAttendance)

ORDER BY DatePart('m', AttendanceReg.DateOfAttendance) DESC

Answer 3

The Same thing Can also be done using Switch :)

SELECT EmpAttendance.EmpID, EmpAttendance.Empname, EmpAttendance.EmpSex, EmpAttendance.EmpDepartment, EmpProfileTBL.Salary, 
SUM(SWITCH(EmpAttendance.AttendStatus = 'Present', 1, EmpAttendance.AttendStatus = 'Absent', 0, EmpAttendance.AttendStatus = 'Half-Day', 0)) AS TotalPresent,
SUM(SWITCH(EmpAttendance.AttendStatus = 'Absent', 1, EmpAttendance.AttendStatus = 'Present', 0, EmpAttendance.AttendStatus = 'Half-Day', 0)) AS TotalAbsent,
SUM(SWITCH(EmpAttendance.AttendStatus = 'Half-Day', 1, EmpAttendance.AttendStatus = 'Present', 0, EmpAttendance.AttendStatus = 'Absent', 0)) AS HalfDay,

DatePart('m', EmpAttendance.DateOfAttendance) AS CurMonth,
((EmpProfileTBL.Salary * TotalPresent) - (EmpProfileTBL.Salary * TotalAbsent) 
                         + ((EmpProfileTBL.Salary / 2) * HalfDay)) AS FinalSalary
FROM ((EmpAttendance INNER JOIN LocalVariableTable
ON EmpAttendance.EmpDepartment = LocalVariableTable.TempDepartment AND
DatePart('m', EmpAttendance.DateOfAttendance) = LocalVariableTable.TempMonth
 AND DatePart('yyyy', EmpAttendance.DateOfAttendance) = LocalVariableTable.TempYear)
INNER JOIN
EmpProfileTBL ON EmpAttendance.EmpID = EmpProfileTBL.EmpID)

GROUP BY EmpAttendance.EmpID, EmpAttendance.Empname, EmpAttendance.EmpSex,
EmpAttendance.EmpDepartment, DatePart('m', EmpAttendance.DateOfAttendance), 
EmpProfileTBL.Salary
ORDER BY DatePart('m', EmpAttendance.DateOfAttendance) DESC