OracleE语句的执行时间需要使用 SET TIMING ON，例如：

[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.

连接到:

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>