1.for循环语句：
for loop_counter in [REVERSE] lowest_number .. highest_number
loop
{.statements.}
end loop;
示例：
declare
v_i number(4) := 0;
begin
for v_i in 0 .. 10
loop
dbms_output.put_line(v_i);
end loop;
end;
begin
for rec in (select * from dba_objects where rownum<100) loop
dbms_output.put_line(rec.object_id);
end loop;
end;
2.while循环语句：
时间： 2024-10-21 15:51:38