3. Logic Model\Physical Model: [普] 逻辑模型\物理模型由于数据库厂商实在太多, 如MS SQL, MySQL, DB2, Oracle等, 在DataType, SQL语句, 命名原则方面, 各有不同, 在设计数据库时也许要考虑到日后数据库的更换, 着眼于长远,我们需要设计一个与具体厂商无关的Model,, 这便是Logic Mo...
Learn the differences between a logical data model and a physical data model, how they are used, and how they work together. Get the guide now.
aThrough carries on the analysis to the system by system logic model, and then from the logic model to obtain the optimal physical model. The logical model and physical model of this spiral loop optimization design model reflects the combination of top-down, bottom-up design idea. 通过继续分析...
Physical Model Design We can see that the complexity increases from conceptual to logical to physical. This is why we always first start with the conceptual data model (so we understand at high level what are the different entities in our data and how they relate to one another), then move...
在讨论三种数据模型之前,我们首先学习一下所谓的数据模型。数据模型由三部分组成:数据结构、数据操作和数据约束。 数据结构:数据结构主要描述数据的类型、内容、性质、以及数据之间的联系,是整个数据模型的基础,而针对数据的操作和数据之间的约束都是建立在数据结构的基础上的; ...
1、用逻辑模型(Logical Model)生成物理模型(Physical Model)。2、选择Tools->Generate Reports...。 locesoft.blog.sohu.com|基于244个网页 2. 逻辑资料模型 ●透过图型化直觉式介面,建构共通性的逻辑资料模型(Logical Model),依选定的厂牌资料库转换为对应厂牌资料库的实体资料 … ...
(For Couchbase, sharding and partitioning is automatic. Replication is a drop-down box to select how many replicas you want). The physical data model is typically created by DBAs and/or developers. Physical Data Model Example Here’s an example of a physical model for Couchbase: It’s ...
Freight Data Architecture Business Process, Logical Data Model, and Physical Data ModelData collectionData sharingDatabasesFreight transportationPrivate enterpriseRecommendationsStakeholdersTexasIn November 2011, the Texas Department of Transportation (TxDOT) funded a study to integrate data from multiple s...
business analyst uses a conceptual and logical model to model the business objects exist in the system, while database designer or database engineer elaborates the conceptual and logical ER model to produce the physical model that presents the physical database structure ready for database creation...
Model Driven Data Service Development business process modelbusiness serviceData integration (DI) is usually used to combine a myriad of configurations, databases and applications. However, it ... Zhang,Xiao-guang - IEEE International Conference on Networking 被引量: 20发表: 2008年 System and method...