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;