Select the different types of data modelling available:ConceptualEntityPhysicalCandidateLogical
Question
Select the different types of data modelling available:
- Conceptual
- Entity
- Physical
- Candidate
- Logical
Solution
The different types of data modeling available are:
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Conceptual Data Modeling: This is the most abstract form of data modeling. It includes the important entities and the relationships among them. It doesn't contain any detailed information about the attributes and is often used in the initial planning phase.
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Entity Relationship Modeling: This type of data modeling involves identifying the entities, attributes, relationships, and constraints of the data. It is more detailed than conceptual modeling and is often used in the design phase.
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Physical Data Modeling: This is the most detailed form of data modeling. It includes all the tables, columns, and relationships between them. It is often used in the implementation phase.
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Candidate Data Modeling: This type of data modeling is used to identify the candidate keys in a database. A candidate key is a column, or set of columns, in a table that can uniquely identify any database record without referring to any other data.
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Logical Data Modeling: This type of data modeling includes all the details of the data, including entities, relationships, and attributes, but it doesn't include any information about how the data will be implemented in the database. It is often used in the design phase, after the conceptual model has been created and before the physical model.
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