SQL> select * from v$version; //查看数据库版本
BANNER
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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
到此为止，升级工作初步完成