Oracle 存储过程
存储过程:
declare cursor cu_student(minAge in number,maxAge in number) is
select * from students
where student_age>=minAge and student_age<=maxAge;
student students%rowtype;

begin
open cu_student(19,20);
fetch cu_student into student;

while cu_student%found loop
dbms_output.put_line(student.student_name||':'||
student.student_age||'岁');
fetch cu_student into student;
end loop;

close cu_student;
end;

请问如下语句在如上存储过程中是什么意义？由其是while cu_student%found loop这句是什么意思？

-while cu_student%found loop
-dbms_output.put_line(student.student_name||':'||
-student.student_age||'岁');
-fetch cu_student into student;
-end loop;




------解决方案--------------------
我的异常网推荐解决方案：oracle存储过程,http://www.aiyiweb.com/oracle-develop/177537.html
------解决方案--------------------
%FOUND %NOTFOUND 判断游标所在的行是否有效，如果有效，则%FOUNDD等于true，否则等于false


------解决方案--------------------

SQL code

declare
  --定义一个参数游标，参数为minAge，maxAge
  cursor cu_student(minAge in number, maxAge in number) is
    select *
      from students
     where student_age >= minAge
       and student_age <= maxAge;
   --定义一个students类型的变量
  student students%rowtype;
begin
  open cu_student(19, 20);   --打开游标，用19，20作参数
  fetch cu_student   --取出一条记录到student变量中
    into student;

  while cu_student%found loop   --当发现有取出记录时，循环游标，没有取得记录时就会退出
    dbms_output.put_line(student.student_name || ':' ||    --打印当前取出的这记录信息
                         student.student_age || '岁');
    fetch cu_student   --从游标中取出一条记录到student变量中
      into student;
  end loop;

  close cu_student;   --游标需要关闭
end;