【Oracle】 Oracle中用户(User)和模式(Schema)的概念


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数据库理论中数据库用户和数据库模式并没有必然的联系,详细的数据库模式解释可以在这里找到:

https://stackoverflow.com/questions/2674222/what-is-purpose-of-database-schema

A database schema is a way to logically group objects such as tables, views, stored procedures etc. Think of a schema as a container of objects.You can assign a user login permissions to a single schema so that the user can only access the objects they are authorized to access.Schemas can be created and altered in a database, and users can be granted access to a schema. A schema can be owned by any user, and schema ownership is transferable.

也就是说数据库模式可以创建修改,并且可以给不同的用户访问也可以赋予不同的用户。

而Oracle文档《Concepts》中的解释是这样的:

schema is a collection of logical structures of data, or schema objects. A schema is owned by a database user and has the same name as that user. Each user owns a single
schema. 

虽然Oracle中模式也是数据对象的集合,但是在这里一个用户对应了一个模式,一个模式只能被一个数据库用户所拥有。

 

 

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