Explain The Difference Between External Internal And Conceptual Schemas

Explain The Difference Between External Internal And Conceptual Schemas. The internal schema is also known as a physical schema It uses the physical data model It is used to define that how the data will be stored in a block The physical level is used to describe complex lowlevel data structures in detail 2 Conceptual Level The conceptual schema describes the design of a database at the conceptual level.

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 This includes table structure consisting fields External schema is the view provided to the userthis is the logical view of the data.

Three Schema Architecture[Logical, Physical schema, user view]

External Schema represents data accessed by end users or application programs it provides customized information to the end users Internal Schema represents the physical storage of data on a disk or a physical storage device Conceptual schema maps internal schema data to the external schema.

CH1Activity#2_Solved Google Docs

In a relational DBMS the conceptual schema describes all relations that are stored in the database The external schemas specify views that enable different users of the data to see it in different ways As a simple example some users of policy data might not require details of the commission paid.

Solved: Exercise 1.4 Explain the difference between

PPT file14 Explain the difference between external internal and conceptual schemas External schemas Allow data access to be customized at the level of individual users or groups of users using different VIEWS of the same conceptual schema Views are not stored in DBMS but they generated ondemand Conceptual (logical) schemas.