Data Modeling Online Training
Data Modeling Online Training
Data Modeling Online Training
Data Modeling Online Training Course Content :
Introduction to Logical Data Modeling
- Definitions
- Benefits of logical data modeling
- Data modeling vs. physical database design
- Roles involved in data modeling
- Steps in the data modeling process
- Example data model
Entities
- Identifying entities
- Validating entities
- Documenting “instances” of entities
- Distinguishing entities from attributes
- Naming entities
- Starting an Entity/ Relationship (E/R) diagram
- Workshop
Relationships
- Identifying significant relationships
- Determining the “cardinality” or “degree” of a relationship
- One-to-One
- One-to-Many
- Many-to-Many
- Determining whether a relationship is optional or mandatory
- Giving a relationship a name
- Documenting the relationships in the E/R diagram
- Walking people through an E/R diagram
- Workshop
- Resolving Many-to-Many Relationships
- Real-world examples of many-to-many relationships
- Why many-to-many relationships are broken down into simpler relationships
- Identifying “association” or “intersection” entities
- Documenting the new relationships in the E/R diagram
- Workshop
Attributes and Normalization
- Defining and categorizing attributes
- Domains and integrity rules
- Unique identifiers/ primary keys
- Foreign keys
- Occurrence population
- Normalization: validating the placement of each attribute
- Attribute does not repeat (first normal form)
- Attribute is dependent on its entire UID (second normal form)
- Attribute is dependent only on its UID (third normal form)
- Workshop
Subtypes and Supertypes
- Identifying subtypes: real-world examples of subtypes and supertypes
- Determining when entities are similar
- UIDs
- Attributes
- One-to-one relationships
- Creating subtypes and supertypes
- “Type” entities
- Using subtypes to apply fourth normal form
- Establishing the relationships of the sub- and super-entities to other entities
- Mutually exclusive vs. non-mutually exclusive subtypes
- “Role” entities to handle complex subtypes
- Workshop
Recursive Relationships
- Real-world examples of recursive relationships
- Discovering recursive relationships
- Determining whether the relationships are optional or mandatory
- Documenting the new relationships in the E/R diagram
- Hierarchical vs. Network recursive relationships
- “Structure” or “Bill of Materials” entities: fifth normal form
- Workshop
Appendix: Implementing a Relational Database
- Relational database objects: tables, views, indexes, etc.
- Mapping logical objects to physical objects
- De-normalization
- Why
- How
- Pros/Cons
- Distributing databases
- Referential integrity