更多关于模式的信息:

在SQL 2005中，模式是对对象进行分组的一种方式。它是一个容器，你可以把对象放进去。人们可以拥有这个物品。您可以授予模式上的权限。

在2000年，一个模式相当于一个用户。现在它已经摆脱了束缚，变得相当有用。你可以把你所有的用户过程放在一个模式中，把你的管理过程放在另一个模式中。将EXECUTE授予适当的用户/角色，就完成了对特定过程的EXECUTE授权。好了。

点表示法是这样的:

Server.Database.Schema.Object

or

myserver01.Adventureworks.Accounting.Beans

这篇文章只涉及到Oracle, Schema的定义在另一个DB上下文中会发生变化。

可能是那种让人受不了的事情，但供你参考的术语似乎在定义上有所不同，这是最烦人的事情:)

在Oracle中，数据库就是数据库。你可以把它想象成数据文件和重做日志，以及数据库本身在磁盘上的实际物理存在(即不是实例)。

Schema实际上就是一个用户。更具体地说，它是用户拥有的一组表/ pros /索引等。另一个用户有不同的模式(他/她拥有的表)，但是用户也可以看到他们有选择特权的任何模式。因此，一个数据库可以由数百个模式组成，每个模式由数百个表组成。您可以在同一数据库中的不同模式中拥有具有相同名称的表。

表是一个表，一组包含数据的行和列，并且包含在模式中。

例如，SQL Server中的定义可能不同。我不知道这件事。

数据库模式是对表、视图、存储过程等对象进行逻辑分组的一种方式。把模式看作是对象的容器。 表是行和列的集合。 所有表的组合构成一个db。

来自PostgreSQL文档:

A database contains one or more named schemas, which in turn contain tables. Schemas also contain other kinds of named objects, including data types, functions, and operators. The same object name can be used in different schemas without conflict; for example, both schema1 and myschema can contain tables named mytable. Unlike databases, schemas are not rigidly separated: a user can access objects in any of the schemas in the database he is connected to, if he has privileges to do so. There are several reasons why one might want to use schemas: To allow many users to use one database without interfering with each other. To organize database objects into logical groups to make them more manageable. Third-party applications can be put into separate schemas so they do not collide with the names of other objects. Schemas are analogous to directories at the operating system level, except that schemas cannot be nested.

A schema is not a plan for the entire database. It is a plan/container for a subset of objects (ex.tables) inside a a database. This goes to say that you can have multiple objects(ex. tables) inside one database which don't neccessarily fall under the same functional category. So you can group them under various schemas and give them different user access permissions. That said, I am unsure whether you can have one table under multiple schemas. The Management Studio UI gives a dropdown to assign a schema to a table, and hence making it possible to choose only one schema. I guess if you do it with TSQL, it might create 2 (or multiple) different objects with different object Ids.

我试着根据我对以下类比的理解来回答:

A database is like the house In the house there are several types of rooms. Assuming that you're living in a really big house. You really don't want your living rooms, bedrooms, bathrooms, mezzanines, treehouses, etc. to look the same. They each need a blueprint to tell how to build/use them. In other words, they each need a schema to tell how to build/use a bathroom, for example. Of course, you may have several bedrooms, each looks slightly different. You and your wife/husband's bedroom is slightly different from your kids' bedroom. Each bedroom is analogous to a table in your database. A DBMS is like a butler in the house. He manages literally everything.