oracle 科普

 

Schem定義

A schema is a collection of database objects (used by a user.).
Schema objects are the logical structures that directly refer to the database’s data.
A user is a name defined in the database that can connect to and access objects.
Schemas and users help database administrators manage database security.

schema爲數據庫對象的集合，相似於包名，如：tables, views, sequences, stored procedures, synonyms, indexes, clusters, and database links。一般一個用戶有一個缺省的schema，用戶名與schema的名稱一致。固然一個用戶能夠管理多個schema。