在存储过程中执行3种oracle循环语句

create or replace procedure pr_zhaozhenlong_loop
/*
名称：在存储过程中执行3种循环语句
功能：利用循环给表中插入数据
调用：
      begin
        -- Call the procedure
        pr_zhaozhenlong_strsql;
      end;

创建人：赵振龙
创建时间：2007-01-03
*/
is
     i int;
begin
     i :=1;
     loop
         insert into tb_zhaozhenlong(rpt_date ,dept_id,item,qty) values(to_date('2007-01-01','yyyy-MM-dd'),'D'||i,'I'||i,round(i*100/3,3));
         exit when i =10;
         i :=i+1;
     end loop;
     --
     i :=1;
     while i<=5 loop
         insert into tb_zhaozhenlong(rpt_date ,dept_id,item,qty) values(to_date('2007-01-02','yyyy-MM-dd'),'D'||i,'I'||i,round(i*200/3,3));
         i :=i+1;
     end loop;
     --如果指定了reverse选项，则循环控制变量会自动减1，否则自动加1
     for j in reverse  1..10 loop
         --insert into tb_zhaozhenlong(rpt_date ,dept_id,item,qty) values(to_date('2007-01-03','yyyy-MM-dd'),'D'||j,'I'||j,round(j*300/3,3));
         insert all --first，不会被重复插入
         when i <> 2 then into tb_zhaozhenlong(rpt_date ,dept_id,item,qty)
         else into tb_temp_zhaozhenlong(rpt_date ,dept_id,item,qty)--如果两个表结构完全一样，则列举不用列名
         select to_date('2007-01-02','yyyy-MM-dd')as rpt_date,'D'||j as dept_id,'I'||j as item,round(j*300/3,3) as qty from dual;
     end loop;
     commit;

     --？？？？？？？
     <<outer_zzl>>--？？？？？？
     for x in  1..10 loop
         <<inner_zzl>>
         for y in 1..100 loop
         i :=x*y;
         exit outer_zzl when i=500;
         exit when i =300;
         end loop inner_zzl;
         --<<inner_zzl>>
     end loop outer_zzl;
     --<<outer_zzl>>
end；
/