2. Note – Answer (1 of 1): This is the 3 layer architecture of database.Internal schema refers to the physical storage of data on storage media, as files on magnetic disc or tape.Conceptual schema is the data structure or the file structure through which the data are accessed. It is provided by mapping between the internal schema and the conceptual schema. the logical data independence is hard to achieve because all the manipulation is belonging in logical data independence but in physical data independence only show the physical view . Logical data independence is more difficult to achieve than is physical data independence, since application programs are heavily dependent on the logical structure of the data that they access. Hence, in this way, the Physical Data Independence enables us to do Performance Tuning. date format stored as text) 4. The difference between logical and physical data independence Logical data independence means that users are shielded from changes in the logical structure of the data, while physical data independence insulates users from changes in the physical storage of the data. By signing up, you'll get thousands of... for Teachers for Schools for Working Scholars® for College Credit What is the difference between procedural and nonprocedural DMLs? 4. Generally, it is necessary to model data before storing them to the database. Software related issues. It allows you to provide a logical description of the database without the need to specify physical structures. Physical model needs to specify exact data format (eg. logical data independence: change in metadata structure (logical representation of data) should not effect how application interacts to database. Physical Data Independence Physical data independence is the capacity to change the physical file structure of a database without disturbing or upsetting the existing users and processes. First Level of Data Independence. 3. Physical data independence helps you to separate conceptual levels from the internal/physical levels. I love learning and teaching Logical data independence in the ability to modify the … Logical and physical database models are required in order to visually present the database that has been proposed for a certain business requirement. 2. DIFFERENCE BETWEEN PHYSICAL AND LOGICAL DATA INDEPENDENCE 1. If we do any changes in the conceptual view of the data, then the user view of the data would not be affected. Please write to us at contribute@geeksforgeeks.org to report any issue with the above content. Posted by Shweta at 2:17 PM Newer Post Older Post Home Logical data independence makes it possible to change the structure of the data independently of modifying the applications or programs that make use of the data. Logical and physical database models are required in order to visually present the database that has been proposed for a certain business requirement. customer_id) where logical uses business … If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to contribute@geeksforgeeks.org. Physical Data Independence : Logical Data Independence : Discuss the different types of user-friendly interfaces and the types of users who typically use each. • A physical data model describes the physical structure of the database. 1.What is the difference between logical data independence and physical data independence? E.g. Hence, modification in the logical level should not result in any changes in the view levels or application programs. Physical Data Independence is defined as the ability to make changes in the structure of the lowest level of the Database Management System (DBMS) without affecting the higher-level schemas. 3. Change to the internal schema, such as using different file organization or storage structures, storage devices, or indexing strategy, should be possible without having to change the conceptual or external schemas. Physical Data Independence: Physical data independence is the ability to modify the inner schema without having alteration to the conceptual schemas or application programs. Those two models and dictionaries: 1 t need to specify physical structures us at contribute @ geeksforgeeks.org to any... Be defined as the capacity to change the physical level, we not! The models help in showing the association of business requirements and the actual data is in! 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