Which of the following is a purpose of logical and physical database design? The preparation of a final conceptual model and the implementation of the database.
The purpose of building a physical design of your database is to optimize performance while ensuring data integrity by avoiding unnecessary data redundancies. During physical design, you transform the entities into tables, the instances into rows, and the attributes into columns.
The goal of logical database design is to create well structured tables that properly reflect the company's business environment.
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.
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.
The physical design is the process of transforming a circuit description into the physical layout, which describes the position of cells and routes for the interconnections between them.
Definition. 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.
Physical database design is the process of transforming a data model into the physical data structure of a particular database management system (DBMS).
Physical data models are used to visualize the physical structure of databases and data files. Logical data models are used to visualize data entities, attributes, keys, and relationships.
- Triggers, tables, procedures, views, keys etc are typical examples of logical database components.The Logical database component consists two types: Tablespaces. ... Tablespace: ... There are three different types of tablespaces: ... Database Schema objects: