What it means to use Oracle Oracle_sid

I. Identifying a DB instance when using database native connection database

That is, when you use Sqlplus to connect to the database, Oracle_sid is the one that connects to that DB instance. It has nothing to do with an instance of @

Second, Oracle_sid for database and operating system interaction

Three, Oracle_name and Oracle_sid one by one correspondence (instance_name is the database parameter)

Reference:

Http://wenku.baidu.com/link?url=7UR0ATcqpyftH-v4NGWKo_M1hPEkq12_ Govmch8vo8kjnkqgxfck4gbwzbkj8hnlyrehj2dqfup5ywucdtzm3bfienyw1jnvjjpkmv7un_w

http://blog.csdn.net/studyvcmfc/article/details/5321073

What it means to use Oracle Oracle_sid