查看oracle版本 及各版本之间的差异
执行 select * from v$version;
结果如下：
Oracle Database 11g Enterprise Edition Release 11.2.0.2.0 - 64bit Production
PL/SQL Release 11.2.0.2.0 - Production
"CORE11.2.0.2.0Production"
TNS for HPUX: Version 11.2.0.2.0 - Production
NLSRTL Version 11.2.0.2.0 - Production
各版本差异
