蛋塔賣你 (Data Mining)

Conceptual design: that can be represented and manipulated using some computerized tools so that it can be easily maintained, modified, and transformed into a data baesd implementation. Such as: ER model (Entity-Relationship model)

Logical design：that can be expressed in a data model implemented in a commerical DBMS. Such as: Relational Data Model

Physical design: during which further specifications are provided for storing and accessing the database

Source: Database Systems by Rmaes Elmasri

下表可以看出其在不同特性上的差異：