[oracle@jw ~]$ sqlplus "/as sysdba"
sql*plus: release 9.2.0.4.0 - production on 
星期二 8月 28 16:59:43 2007
copyright (c) 1982, 2002, oracle 
corporation. all rights reserved.

oracle9i enterprise edition 
release 9.2.0.4.0 - production
with the partitioning, oracle label security, 
olap and oracle data mining options
jserver release 9.2.0.4.0 - production
sql> set timing on;
sql> select count(*) from tab;

count(*)
----------
2447

已用时间: 00: 00: 00.12
sql>