如何查看Oracle数据库版本? Metalink上有一段话，COPY过来复用吧。
To determine the release information for these databases:
Start SQL*Plus from the Oracle home directory:
sqlplus /nolog
SQL> conn / as sysdba
The output is:
Connected
Enter the following command:
SQL> select * from v$version;
The command returns the release information, such as the following:
Oracle9i Enterprise Edition Release 9.2.0.8.0 - Production
PL/SQL Release 9.2.0.8.0 - Production
CORE 9.2.0.8.0 Production
TNA for 32-bit Windows: Version 9.2.0.8.0 - Production
NLSRTL Version 9.2.0.8.0 - Production