Analysis of Data and creating Tables & Relationships: Usually in a data model, Tables (Entities) looks like rectangular or square type…
Data Modeling Development Cycle Following are the important phases in the Data Model Development Life Cycle. Gathering Business Requirements Conceptual…
SuperType and SubType in Data Modeling: At times, few entities in a data model may share some common properties (attributes)…
Dimensional Data Modeling comprises of one or more dimension tables and fact tables. Good examples of dimensions are location, product,…
The completed relational data model is shown in the previous part and the corresponding data stored in database are shown in separate…
Upon discussion with business analysts, data modeler can come up with the following conclusions regarding grouping and relationship between the…
The sample source data shown in the table below provides the information about employees, their residential state, county, city and…
Relational (OLTP) Data Modeling: Relational Data Model is a data model that views the real world as entities and relationships.…
Physical Data Modeling: Physical data model includes all required tables, columns, relationships, database properties for the physical implementation of databases. Database…
Logical Data Modeling: This is the actual implementation and extension of a conceptual data model. A Logical data model is…