查看oracle的版本信息
用客户端连接到数据库，执行select * from v$instance(查看version项)
···
SELECT * FROM PRODUCT_Component_version
| PRODUCT | VERSION | STATUS |
|---|---|---|
| NLSRTL | 11.2.0.1.0 | Production |
| Oracle Database 11g Enterprise Edition | 11.2.0.1.0 | 64bit Production |
| PL/SQL | 11.2.0.1.0 | Production |
| TNS for 64-bit Windows: | 11.2.0.1.0 | Production |
···
SELECT * FROM V$VERSION查看组件级信息