conceptual data model in visio

Tags: databaseI've heard of it before, in the project. Powerdesinger , but has never been used, this time through the foundation of the elective module finally has the opportunity to pass Powerdesinger of the CDM model to create a database. Powerdesinger There are several data models in the system, namely: M----Model,

Model design of Data WarehouseA. Data Modeling MethodologyThe design of the Data warehouse model follows the design principle of "top-down and gradual refinement".The design of the model is divided into three stages:1,

Original Address http://blog.itpub.net/23659908/viewspace-1118762/ Thank you. model design of Data Warehouse A. Data Modeling Methodology The design of Data warehouse model follows the design principle of "top-down and gradual refinement".

The foothold of this article is not a data mining-based algorithm or some detailed algorithm implementation. I have already written a lot of details about this in some blog posts, but at first we saw this pure technology blog, some formulas and some algorithms, which are hard to avoid. Therefore, in the early stage, it is necessary to provide overall conceptual guidance. It is a good thing for those who wan

Model design of Data Warehouse A. Data Modeling MethodologyThe design of the Data warehouse model follows the design principle of "top-down and gradual refinement".The design of the model is divided into three stages:1 , the

that determines the name of the generated object, including the foreign key column in the Model check box When you click Finish, the wizard generates a model with three tables and a view. The wizard reads the FOREIGN KEY constraint from the database and deduces a one-to-many relationship between poet and poem (s), as well as a a-to-many relationship between meter and poem (s). Figure 2-9

1. Meaning: Used in databases to abstract, represent and process data and information in the real world2. Classification: Conceptual models, physical models, and logical modelsAmong them, the logical model includes: Hierarchical model, net model, relational modelThe constitu

1. Introduction to PDM The Physical Data Model (Physical Data Model) PDM provides the basic elements required for the initial design of the system and the relationship between related elements; the physical design stage of the database must be detailed on the basis of the background design, including the database store

the name of the generated object, including the foreign key column in the Model check boxWhen you click Finish, the wizard generates a model with three tables and a view. The wizard reads the FOREIGN KEY constraint from the database and deduces a one-to-many relationship between poet and poem (s), as well as a a-to-many relationship between meter and poem (s).Figure 2-9

After PDM is completed, it will eventually be converted into a database entity.1. Check whether the DBMS set by powerdesigner is correct, that is, whether it is the database type we want to generate. Here I use sqlserver2000:Powerdesigner-> database-> change the current DBMS and select your database type. 2. Configure the connection between powerdesigner and the data sourcePowerdesigner-> database-> Configure connection-> User DSN (or system DSN)-> se

number, work class, exit Section..., Income section) L detailed list of precise cash splitting results Tb_cashaccuratesplitresult (flow number, work class, exit Section..., Income section) L stream non-precise splitting record table Tb_inaccuratesplitrecord..., Income section) L split the journal exception record table Tb_outlistspliterrorgb (flow number, work class, exit section,..., Error Type Code) L split the History Table of flow exception records Tb_outlistspliterrorgb_his (serial number,

The Entity Data model is a new feature introduced in the. NET Framework v3.5 SP1, a more powerful ORM than LINQ to SQL, allowing developers to focus only on the development of the domain object model without considering how they interact with relational databases. This series of articles delves into the following: EDMX Schema files,

Entity Framework tutorial -- create an object data model, entityframework Create an object data model: This article will show you how to create an EDM SchoolDB database and understand the infrastructure module. The Entity Data Model