sqlplus的技巧实在是多，以后慢慢总结了。

SQL> column F new_val F
SQL> select to_char(sysdate,'yyyymmddhh24miss')||'.txt' F from dual;

F
------------------
20050124174926.txt

SQL> spool &F

Connected to:
Oracle8i Enterprise Edition Release 8.1.7.0.0 - Production
With the Partitioning option
JServer Release 8.1.7.0.0 - Production

SQL> column F new_val F
SQL> select to_char(sysdate,'yyyymmddhh24miss')||'.txt' F from dual;

F
------------------
20050124174926.txt

SQL> spool &F
SQL> select * from tab;

TNAME TABTYPE CLUSTERID
------------------------------ ------- ----------
EMP TABLE
FK1 TABLE
HASHTAB TABLE
HASHTAB5 TABLE
HASHTABLE TABLE
HASHTABT TABLE
MLOG$_T TABLE
MLOG$_T_MASTER TABLE
OB TABLE
PK1 TABLE
PLAN_TABLE TABLE

TNAME TABTYPE CLUSTERID
------------------------------ ------- ----------
RUPD$_T TABLE
RUPD$_T_MASTER TABLE
T TABLE
TCAAA TABLE
TESTLONG TABLE
TESTLONG2 TABLE
TRAN TABLE
TTTT TABLE
T_MASTER TABLE
VVV TABLE

21 rows selected.

SQL> spool off
SQL> host type &F
SQL> select * from tab;

TNAME TABTYPE CLUSTERID

------------------------------ ------- ----------

EMP TABLE

FK1 TABLE

HASHTAB TABLE

HASHTAB5 TABLE

HASHTABLE TABLE

HASHTABT TABLE

MLOG$_T TABLE

MLOG$_T_MASTER TABLE

OB TABLE

PK1 TABLE

PLAN_TABLE TABLE


TNAME TABTYPE CLUSTERID

------------------------------ ------- ----------

RUPD$_T TABLE

RUPD$_T_MASTER TABLE

T TABLE

TCAAA TABLE

TESTLONG TABLE

TESTLONG2 TABLE

TRAN TABLE

TTTT TABLE

T_MASTER TABLE

VVV TABLE

21 rows selected.

SQL> spool off

SQL>