Oracle游标简单使用

DECLARE CURSOR CUR IS SELECT A.EMPNO,A.ENAME FROM SCOTT.EMP A;
        V_EMPNO SCOTT.EMP.EMPNO%TYPE;
        V_ENAME SCOTT.EMP.ENAME%TYPE;
BEGIN
        --打开游标
        OPEN CUR;
        --判断是否打开
        IF CUR%ISOPEN THEN 
        LOOP
          --当无数据时,退出循环
          EXIT WHEN CUR%NOTFOUND;
          FETCH CUR INTO V_EMPNO,V_ENAME;

          DBMS_OUTPUT.put_line(V_EMPNO||':'||V_ENAME);          
        END LOOP;
        END IF;
        --关闭游标
        CLOSE CUR;
END;