Question

我有使用Cursor和fetch的LOOP语句，但是我可以“FOR LOOP”。

DECLARE
   emp_rec employees%ROWTYPE;
   CURSOR Cur_emp IS 
     SELECT * 
       FROM employees 
      order by employees.last_name asc; 
BEGIN
   OPEN Cur_emp;
   LOOP
      FETCH Cur_emp INTO emp_rec; 
      exit when Cur_emp%notfound;
      dbms_output.put_line(‘Employee Name–>’|| emp_rec.LAST_NAME);
   END LOOP;
   CLOSE Cur_emp;  
END;

我想要：

DECLARE
   emp_rec employees%ROWTYPE;
   CURSOR Cur_emp IS 
     SELECT * 
       FROM employees 
      order by employees.last_name asc; 
BEGIN
   FOR item IN Cur_emp
   LOOP
     FETCH Cur_emp INTO emp_rec;
     exit when Cur_emp%notfound;
     dbms_output.put_line(‘Employee Name–>’|| emp_rec.LAST_NAME);
   END LOOP;
END;
/

由于FETCH Cur_emp INTO emp_rec INVALID CURSOR ORA-01001

，这不起作用

Answer 1

删除FETCH和EXIT WHEN，并将emp_rec引用替换为item，如下所示：

DECLARE
CURSOR Cur_emp IS SELECT * FROM employees order by employees.last_name asc; 
BEGIN
FOR item IN Cur_emp
LOOP
dbms_output.put_line(‘Employee Name–>’|| item.LAST_NAME);
END LOOP;
END;
/

ORACLE for LOOP with Cursor

1 个答案: