Physical database design discusses the concept of how physical structures of databases affect performance, including specific examples, guidelines, and best and worst practices for a variety of dbmss and configurations something as simple as improving the table index design has a profound impact on performance. One of the most important decisions that needs to be made when creating a new database is where to store the log, data, and instance’s tempdb files on disk. After completing the logical design of your database, you now move to the physical design 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.
The physical design of the database specifies the physical configuration of the database on the storage media this includes detailed specification of data elements , data types , indexing options and other parameters residing in the dbms data dictionary. The physical design of your database optimizes 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 after completing the logical design of your. This is the database questions and answers section on physical database design with explanation for various interview, competitive examination and entrance test solved examples with detailed answer description, explanation are given and it would be easy to understand.
• physical database design is the process of implementing the logical data model in a dbms • we shall assume that the logical data model is the relational data model.
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.
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. 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.
5 physical database design • purpose – translate the logical description of data into the technical specifications for storing and retrieving data • goal – create a design for storing data that will provide adequate performance and insure database integrity, security and recoverability – balance between efficient storage space and.