After the conceptual schema comes the logicalschema — the data model that defines the concepts with greater detail and shows the relationships between the entities.
在概念模式后出现的是逻辑模式——用更多的细节定义概念，并显示实体之间的关系的数据模型。
2
We later moved the schema from its logical representation to a physical DB2 installation, to give the engineering team access to tables and test data.
我们后来将这些计划从它的逻辑表示转化成了一个物理的DB 2安装，并给工程团队访问表和测试数据。
3
With this strategy, you can move up or down to any logical database schema state.