sql group by clause

Question

total	vat rs	discount %
500	5	2
1000	2	2
1200	10	5

i want my result to be calculated as

(500+5) * 2/100 =a
(1000+2)*2/100=b
(1200+10)*5/100=c
" " " " "
""""""
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and result = SUM(a+B+C) rs.

this is what i tried

cmd = new SqlCommand("Select (SUM(P_ttotal)+SUM(P_vatto)* (P_totdis)/100) as dis from PRO_BILL", conn);

but it is throwing exception P_totdis is not in group by clause....
help me in this.
any help will be appreciated

varsha dodiya · Answer

i solved it Select Cast(SUM((O_ttotal + P_vatto) * (P_totdis / 100)) As Decimal(92)) As TotalDiscount From PRO_BILL

varsha dodiya · Answer

@Abrar that i also know in this way i get two answers i want the whole total of (A+B+C) not (A+B) and C

Khan Abrar Ahmed · Answer

HI when you are using the aggregate sql function then you have to define the group by clause. like cmd = new SqlCommand(Select (SUM(P_ttotal)+SUM(P_vatto)* (P_totdis)/100) as dis from PRO_BILL group by P_totdis conn);