SELECT SM THEN UPDATE LOOP : i want to make the sum of the column FLAN01+FLAN02+FLAN03+FLAN04 AND PUT THE SUM IN FLAWTD FOR EACH FLNUMB;
NEED YOUR HELP THANKS

FLAID	FLCTRY	FLFY	FLLT	FLAPYC	FLAN01	FLAN02	FLAN03	FLAN04	FLAWTD	FLNUMB
2749023	20	17	AA	-2832227	0	0	0	0	0	1
2524	20	17	AA	-164999	0	0	0	0	0	2
2749023	20	17	AA	-2460920	0	0	0	0	0	3
2749023	20	17	AA	-2756040	0	0	0	0	0	4
2524	20	17	AA	-197730	0	0	0	0	0	5
2749277	20	17	AA	-133875	0	0	0	0	0	6
2749091	20	17	AA	-957654	-8619	-8619	-8620	-8619	-94812	7
2749091	20	17	AA	-957654	-8619	-8619	-8620	-8619	-94812	8
2749091	20	17	AA	-957654	-8619	-8619	-8620	-8619	-94812	9
2749091	20	17	AA	-957654	-8619	-8619	-8620	-8619	-94812	10
2749091	20	17	AA	-957654	-8619	-8619	-8620	-8619	-94812	11
2749091	20	17	AA	-921543	-9314	-9314	-9314	-9314	-102453	12
2749091	20	17	AA	-957654	-8619	-8619	-8620	-8619	-94812	13
2749091	20	17	AA	-921543	-9314	-9314	-9314	-9314	-102453	14
2749091	20	17	AA	-921543	-9314	-9314	-9314	-9314	-102453	15
