执行一个存储过程后，执行时没错误提示，但是数据库的表中就是没数据是怎么回事啊？请教高手

执行一个存储过程后，执行时没错误提示，但是数据库的表中就是没数据是怎么回事啊？请教高手，代码如下
create or replace procedure inster_delete_student --(Sno in varchar2,Sname in varchar2,Ssex in varchar2,Sage in number,Sdept in varchar2)
as
begin
  --declare i number(8):=1;
  for i in 1..5 loop
    insert into student_info_1 (Sno,Sname,Ssex,Sage,Sdept) values ('01','张三','女',18,'外语系');
    insert into student_info_1 (Sno,Sname,Ssex,Sage,Sdept) values ('05','王丽','女',21,'文学系');
    insert into student_info_1 (Sno,Sname,Ssex,Sage,Sdept) values ('08','钱多多','女',21,'计算机系');
    end loop;
    commit;
 end inster_delete_student;