What is the difference between logical data model and conceptual data model?

Question

What is the difference between logical data model and conceptual data model?

Answer 1

logical data model

A logical data model describes the data in as much detail as possible, without regard to how they will be physical implemented in the database. Features of a logical data model include: · Includes all entities and relationships among them. · All attributes for each entity are specified. · The primary key for each entity is specified. · Foreign keys (keys identifying the relationship between different entities) are specified. · Normalization occurs at this level. conceptual data model

A conceptual data model identifies the highest-level relationships between the different entities. Features of conceptual data model include: · Includes the important entities and the relationships among them. · No attribute is specified. · No primary key is specified.