What is the difference between conceptual and physical design?
What is the difference between conceptual, logical, and physical designs? – Conceptual designs attempts to identify the highest level of relationships between entities. Conceptual designs include only important entities. – Physical design helps in converting the logical design into the physical form.
What is the difference between conceptual and logical architecture?
The logical data model is an abstract representation of a possible implementation, without being bound to any specific implementation, while the conceptual data model is a high level representation of the business requirements and the connected data sets and relationships.
What is the difference between logical database schema and physical database schema?
Physical schema represents the actual connection to the data source or data target. Logical schema represents the logical name associated to that source or target.
What is conceptual and physical view of database?
The conceptual schema describes the Database structure of the whole database for the community of users. This schema hides information about the physical storage structures and focuses on describing data types, entities, relationships, etc. This logical level comes between the user level and physical storage view.
What is logical model and physical model?
The logical model enables you to represent business information and define business rules. The physical model enables you to focus on the physical implementation of the model in a database. Both the logical and physical models represent design layers in the application development process.
What is logical model in database?
A logical data model is a model that is not specific to a database that describes things about which an organization wants to collect data, and the relationships among these things.
What is logical and physical data model?
A logical data model is a model that describes data as much as possible, without regard to how they will be physically implemented in the database. In contrast, a physical data model is a model that represents how the actual database is built.
What is the meaning of physical logical?
Logical implies a higher view than the physical. Users relate to data logically by data element name; however, the actual fields of data are physically located in sectors on a disk. For example, to find out which customers ordered how many of a particular product, the logical view is customer name and quantity.
What is physical database and logical database?
A logical Database is software, and it can be implemented in any kind of database software. Whereas, Physical database is a specific kind of software and hardware and can be used for one particular purpose. A logical database, also called a Logical data Model, or Logical Schema is a type of data model.
What are the differences between logical and physical ER diagrams and why do these differences exist?
The conceptual model is to establish the entities, their attributes, and their relationships. The logical data model defines the structure of the data elements and set the relationships between them. The physical Data Model describes the database-specific implementation of the data model.