游标的属性 %found,%notfound,%isopen,%rowcount。
%found:若前面的fetch语句返回一行数据,则%found返回true,如果对未打开的游标使用则报ORA- 1001异常。
%notfound,与%found行为相反。
%isopen,判断游标是否打开。
%rowcount:当前游标的指针位移量,到目前位置游标所检索的数据行的个数,若未打开就引用,返回ORA-1001。
1.方法一:
Declare
Cursor my_cursor is select r.person_id,r.emp_number,r.emp_name from hr_user r where rownum between 1 and 10;
My_rec my_cursor%rowtype;
Begin
Open my_cursor; --如果这行错误可以注销
loop
Fetch my_cursor into My_rec ;
DBMS_OUTPUT.PUT_LINE('员工号:' || My_rec.Person_Id || ',员工编号:' || My_rec.Emp_Number || ',员工姓名:' || My_rec.Emp_Name );
Exit when my_cursor%notfound;
End loop;
Close my_cursor;
END;
2.方法二:
Declare
Cursor my_cursor is select r.person_id,r.emp_number,r.emp_name from hr_user r where rownum between 1 and 10;
Begin
For My_rec in My_cursor loop
DBMS_OUTPUT.PUT_LINE('员工号:' || My_rec.Person_Id || ',员工编号:' || My_rec.Emp_Number || ',员工姓名:' || My_rec.Emp_Name );
end loop;
END;
3.方法三:
Declare
Cursor My_cursor is select r.person_id,r.emp_number,r.emp_name from hr_user r where rownum between 1 and 10;
My_rec my_cursor%rowtype;
Begin
Open my_cursor;
Fetch My_cursor into My_rec;
While (my_cursor%found) loop
DBMS_OUTPUT.PUT_LINE('员工号:' || My_rec.Person_Id || ',员工编号:' || My_rec.Emp_Number || ',员工姓名:' || My_rec.Emp_Name );
Fetch My_cursor into My_rec;
End Loop;
END;