>Can these codes change into sql.
>

>
>sele res
>SET ORDER TO CODE
>GO TOP
>DO WHILE .NOT. EOF()
>IF PERC>=80 .AND. PERC<=100
>	REPL GRADE WITH "A+"
>ENDIF
>IF PERC>=70 .AND. PERC<79.99
>	REPL GRADE WITH "A"
>ENDIF
>.............
>

Try UPDATE-SQL command

update Res SET Grade = ICASE(BETWEEN(Perc, 80,100), 'A+', Perc >= 70, 'A',...)

What do you want for the case when Perc > 100 ?