Conceptual design establishes how concepts are related to each other within the database.

Conceptual design is the utilization of normalization rules to apply constraints that allow us to uniquely identify attributes.

Logical design is the logical categorization of entities based on their attributes and provides a general schema of the database.

Conceptual design establishes the entity-relationship model of the data in the database, while logical design maps the entities and their relationships into relational schemas.

Conceptual design establishes the relational schema between entities, applying domain, key, integrity and reference constraints to better categorize and map the relations between entities.