Create Table For Employee & Make 30 Columns, Each Days Of Columns. In Rows Take One ID,In Which Values Are Combination Of "Year + Month". Unique Values For Each Row. When You Enter Employee Id, It Will Display It's Attendance sheet as a Table. In The Each Cell Admin Or Who make entry for Present/Absent of employee.
when admin want to show attendacesheet for emoloyee, he/she will enter the ID of employee & system will show attendancesheet of that employee.