scott@TEST>spool aa.txt;   //将内容保存到aa.txt文件中去
scott@TEST>select * from tab;

TNAME                                                        TABTYPE         CLUSTERID
------------------------------------------------------------ -------------- ----------
BONUS                                                        TABLE
D                                                            TABLE
DEPT                                                         TABLE
E                                                            TABLE
EMP                                                          TABLE
SALGRADE                                                     TABLE
T1                                                           TABLE

7 rows selected.

scott@TEST>spool off;  //关闭保存
scott@TEST>spool aa.txt append;  //将输出内容追加到文件中去，如果不加append 则会覆盖
scott@TEST>select * from emp;

     EMPNO ENAME                JOB                       MGR HIREDATE            SAL       COMM     DEPTNO
---------- -------------------- ------------------ ---------- ------------ ---------- ---------- ----------
      7369 SMITH                CLERK                    7902 17-DEC-80           800                    20
      7499 ALLEN                SALESMAN                 7698 20-FEB-81          1600        300         30
      7521 WARD                 SALESMAN                 7698 22-FEB-81          1250        500         30
      7566 JONES                MANAGER                  7839 02-APR-81          2975                    20
      7654 MARTIN               SALESMAN                 7698 28-SEP-81          1250       1400         30
      7698 BLAKE                MANAGER                  7839 01-MAY-81          2850                    30
      7782 CLARK                MANAGER                  7839 09-JUN-81          2450                    10
      7788 SCOTT                ANALYST                  7566 19-APR-87          3000                    20
      7839 KING                 PRESIDENT                     17-NOV-81          5000                    10
      7844 TURNER               SALESMAN                 7698 08-SEP-81          1500          0         30
      7876 ADAMS                CLERK                    7788 23-MAY-87          1100                    20
      7900 JAMES                CLERK                    7698 03-DEC-81           950                    30
      7902 FORD                 ANALYST                  7566 03-DEC-81          3000                    20
      7934 MILLER               CLERK                    7782 23-JAN-82          1300                    10

14 rows selected.

scott@TEST>spool off;