oracle环境变量详解

              If you’re unfamiliar with the term SID or  ORACLE_SID, a full definition is called for. The SID is a  site identifier . It and  ORACLE_HOME (where the Oracle software is installed) are hashed together in UNIX to create a unique key name for attaching an SGA. If your  ORACLE_SIDor  ORACLE_HOME is not set correctly, you’ll get the  ORACLE NOT AVAILABLE error, since you can’t attach to a shared memory segment that is identified by this unique key. On Windows, shared memory isn’t used in the same fashion as UNIX, but the SID is still important. You can have more than one database on the same ORACLE_HOME, so you need a way to uniquely identify each one, along with their configuration files.

            ORACLE_HOME环境变量是Oracle软件的安装路径，顺带ORACLE_BASE环境变量是Oracle软件安装的基目录。

oracle环境变量详解

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