Select a governance model aligned with organizational needs. Data models can be represented conceptually, physically, or logically. A popular form of data modeling is called a data entity relationship diagram, or an ERD. It documents all of the data within your organization and the relationship bet...
1.4.1 The Data Model Figure 1-3 shows an Entity Relationship Diagram (ERD) for the sample database. Figure 1-3. The sample database As you can see from the ERD, there are only three entities: EMPLOYEE, PROJECT, and PROJECT_HOURS. Table 1-2 gives a brief description of each entity. ...
Ashley Peacockis a staff engineer and architect working in the UK tech industry with over 10 years of experience. He’s an avid user of diagrams, and a huge advocate for their power in conveying ideas, documenting architectures, and whiteboarding problems. ...
You can only determine if an entity is enabled for hang-off by referencing the associated Entity Relationship Diagram (ERD) located in theinstall_dir/xapidocs/ERD directory. Based on the Extensions.xml file, the application does not create a foreign key constraint in the EFrame_TableChanges.sql...
Mongoid-ERD¶↑ Create model-diagram (ERD graph) via Graphviz using the mongoid’s model source code. Export a executablemerd: $ merd | dot -Tpng > docs/erd.png or: $ merd --model_dir=other/models | dot -Tpng > docs/erd.png ...
When you're designing other databases, you may not be involved in the logical design. If so, you need to check the ERD carefully to make sure it conforms to first normal form. Don't assume that it does. An easy way to check the diagram is to fill it in with some real values - ...