declare @i int;
set @i = 1;
while (@i < 100000) begin
	declare @mod int;
	set @mod = @i % 3;
	if @mod = 0
		insert into sub_class_a(column_a) values(@mod)
	else if @mod = 1 
		insert into sub_class_b(column_b) values(@mod)
	else 
		insert into sub_class_c(column_c) values(@mod)

	set @i = @i+1
end