方法一：使用sqlplus

64位：

[oracle@qs-wg-db2 ~]$ sqlplus / as sysdba;

SQL*Plus: Release 10.2.0.5.0 - Productionon Sun Sep 25 08:57:22 2011

Copyright (c) 1982, 2010, Oracle. All Rights Reserved.

Connected to:

Oracle Database 10g Enterprise EditionRelease 10.2.0.5.0 - 64bit Production

With the Partitioning, OLAP, Data Miningand Real Application Testing options

如果是64位，用sqlplus 连上之后会显示具体的位数信息，32位则不会显示。

32位：

C:\Users\Administrator.DavidDai>sqlplus/ as sysdba;

SQL*Plus: Release 11.2.0.1.0 Production onSun Sep 25 08:55:48 2011

Copyright (c) 1982, 2010, Oracle. All rights reserved.

Connected to:

Oracle Database 11g Enterprise EditionRelease 11.2.0.1.0 - Production

With the Partitioning, OLAP, Data Miningand Real Application Testing options

方法二： 查看v$version 视图

32位：

SQL> select * from v$version;

BANNER

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

Oracle Database 11g Enterprise EditionRelease 11.2.0.1.0 - Production

PL/SQL Release 11.2.0.1.0 - Production

CORE 11.2.0.1.0 Production

TNS for 32-bit Windows: Version 11.2.0.1.0- Production

NLSRTL Version 11.2.0.1.0 - Production

64位：

SQL> select * from v$version;

BANNER

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

Oracle Database 10g Enterprise EditionRelease 10.2.0.5.0 - 64bi

PL/SQL Release 10.2.0.5.0 - Production

CORE 10.2.0.5.0 Production

TNS for Linux: Version 10.2.0.5.0 -Production

NLSRTL Version 10.2.0.5.0 – Production

和第一种方法一样，64位会显示具体的位数信息，32位不会显示。

方法三：查看v$sql 视图

32位：输出为8位16进制数

SQL> select address from v$sql whererownum<2;

ADDRESS

--------

B50ACCAC

64位：输出为16位16进制数

SQL> select address from v$sql whererownum<2;

ADDRESS

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

0000000196FDF7D8