查看安装的ORACLE是32位还是64位

方法一：使用sqlplus
64位：
[Oracle@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
32位：
[oracle@rac1 ~]$ export ORACLE_SID=orcl1
[oracle@rac1 ~]$ sqlplus / as sysdba
SQL*Plus: Release 10.2.0.4.0 - Production on Sat Jun 14 16:24:38 2014

Copyright (c) 1982, 2007, Oracle.  All Rights Reserved.

Connected to:
Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 - Production
With the Partitioning, Real Application Clusters, OLAP, Data Mining
and Real Application Testing options

方法二：查看v$version视图
32位：

SQL> select * from v$version;

BANNER

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

Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 - Prod           --此处提示安装的数据库是32位

PL/SQL Release 10.2.0.4.0 - Production

CORE    10.2.0.4.0      Production

TNS for Linux: Version 10.2.0.4.0 - Production

NLSRTL Version 10.2.0.4.0 - Production
64位：

SQL> select * from v$version;

BANNER

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

Oracle Database 10g Enterprise EditionRelease 10.2.0.5.0 - 64bi     --此处提示安装的数据库是64位

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
方法三：查看v$sql 视图

32位：输出为8位16进制

SQL> select address from v$sql where rownum<2;

ADDRESS

--------

30AE76F0
64位：输出为16位16进制数

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

ADDRESS

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

0000000196FDF7D8