Table of Contents
- 1 What is the difference between logical and physical database design?
- 2 How would you describe the difference between logical and physical system models?
- 3 What is the difference between physical and logical?
- 4 What is logical design and physical design?
- 5 What is logical database design?
- 6 What is the difference between logical and physical design in SDLC?
- 7 What is a physical model of a database?
- 8 What is a physical database?
What is the difference between logical and physical database design?
The main difference between logical database design and physical database design is that logical database design helps to define the data elements and their relationships, but physical database design helps to design the actual database based on the requirements gathered during the logical data design.
How would you describe the difference between logical and physical system models?
The logical model and the physical model are separate models. 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.
What is true about the difference between conceptual database design and logical database design?
A conceptual data model is a model that helps to identify the highest-level relationships between the different entities, while a logical data model is a model that describes the data as much detail as possible, without regard to how they will be physically implemented in the database.
Which activities would you carry out during the physical database design phase?
During the physical design process, you convert the data gathered during the logical design phase into a description of the physical database, including tables and constraints. Physical design decisions, such as the type of index or partitioning have a large impact on query performance.
What is the difference between physical and logical?
Logical Topology reflects arrangement of devices and their communication. It is the transmission of data over physical topology….Difference between Physical and Logical Topology :
Physical Topology | Logical Topology |
---|---|
Depicts physical layout of network. | Depicts logistics of network concerned with transmission of data. |
What is logical design and physical design?
The logical design is more conceptual and abstract than the physical design. In the logical design, you look at the logical relationships among the objects. In the physical design, you look at the most effective way of storing and retrieving the objects. Your design should be oriented toward the needs of the end users.
What is logical database and physical database?
A logical database must be able to access and identify all files within the storage system to operate correctly, whereas a physical database manages a much smaller field of information. Sometimes, a physical database stores only a single file with one value or word in it.
What is the difference between conceptual design and logical design?
What is the difference between conceptual, logical, and physical designs? – Conceptual designs attempts to identify the highest level of relationships between entities. – Logical design includes all entities and the relationships between them. Logical design describes data as much as possible.
What is logical database design?
Definition. Logical database design is the process of transforming (or mapping) a conceptual schema of the application domain into a schema for the data model underlying a particular DBMS, such as the relational or object-oriented data model.
What is the difference between logical and physical design in SDLC?
What is a logical database design?
What is logical and physical data model?
The difference between logical and physical Data Dictionaries is the same as between logical and physical data model: Logical data model is created at the requirements gathering, system analysis and top level design. It is a communication and specification tool for business analysts and business.
What is a physical model of a database?
A physical data model defines all of the logical database components and services that are required to build a database or can be the layout of an existing database. A physical data model consists of the table’s structure, column names and values, foreign and primary keys and the relationships among the tables.
What is a physical database?
Physical database design translates the logical data model into a set of SQL statements that define the database. For relational database systems, it is relatively easy to translate from a logical data model into a physical database.
What is physical data modeling?
Physical Data Model Options. A physical data model (or database design) is a representation of a data design as implemented, or intended to be implemented, in a database management system. In the lifecycle of a project it typically derives from a logical data model, though it may be reverse-engineered from a given database implementation.