方法一：使用sqlplus
64位：
[oracle@~]$sqlplus / as sysdba
SQL*Plus: Release 11.2.0.4.0 Production on Sat May 25 15:12:20 2024
Copyright (c) 1982, 2013, Oracle. All rights reserved.
Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
如果是64位，用sqlplus 连上之后会显示具体的位数信息，32位则不会显示。
32位：
C:\Windows\system32>sqlplus / as sysdba
SQL*Plus: Release 11.2.0.1.0 Production on 星期六 5月 25 14:58:21 2024
Copyright (c) 1982, 2010, Oracle. All rights reserved.
连接到:
Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
SQL>
方法二： 查看v$version 视图
32位：
连接到:
Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
SQL> select * from v$version;
BANNER
--------------------------------------------------------------------------------
Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - Production
PL/SQL Release 11.2.0.1.0 - Production
CORE 11.2.0.1.0 Production
TNS for 32-bit Windows: Version 11.2.0.1.0 - Production
NLSRTL Version 11.2.0.1.0 - Production
64位：可以看到位数
SQL> select * from v$version;
BANNER
--------------------------------------------------------------------------------
Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production
PL/SQL Release 11.2.0.4.0 - Production
CORE 11.2.0.4.0 Production
TNS for Linux: Version 11.2.0.4.0 - Production
NLSRTL Version 11.2.0.4.0 - Production
建议使用下面两种方式，上面的方式高版本可能就不适用了。
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 where rownum select address from v$sql where rownum
