SQL Query to get the Sum of all column values in the last row of a resultset along with row sum (group by)

Question

Can someone please help me to write a query to obtain the TCS and TRS?

ID  Jan Feb Mar TRS
1   4   5   6   15
2   5   5   5   15
3   1   1   1   3
TCS 10  11         


        

Answer 1

select Sum(Jan + Feb + Mar) As TRS