推荐回答（1个）
模式（schema） 是 数据库体系结构中的一个节点
对于 SQL Server 数据库来说。
访问具体的一个表，可以由 4个部分组成
分别为 服务器名， 数据库名，模式名，表名。
对于访问本地的数据库
因为 服务器已经连接上了，因此不用指定
数据库名，通过 use 数据库名 指定了
模式名，如果不指定的话， 数据库 默认使用 dbo 模式。
对于访问链接服务器。
链接服务器名.数据库名.模式名.表名
模式（schema） 是用于 在一个 大项目中的 各个 小项目
每个 小项目的表, 放在 各自的 模式（schema） 下面.
这样, 遇到 小项目里面. 有 相同名字的 表的话, 不会发生冲突.
例如一个 公司的 系统.
里面分2个 子系统, 分别为 财务系统 和 人力资源系统.
这2个 子系统, 共用一个数据库
.
那么 财务系统的表, 可以放在 财务的 模式（schema）.
人力资源系统的表，放在 人力资源系统的模式里面。
这2个 子系统， 能够 互相访问 对方的表
但是又不因为 表重名 的问题，影响对方。
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