What is schema explain different levels of schema?

What is schema explain?

The term "schema" refers to the organization of data as a blueprint of how the database is constructed (divided into database tables in the case of relational databases). The formal definition of a database schema is a set of formulas (sentences) called integrity constraints imposed on a database.

What are the levels of schema?

SummaryThere are mainly three levels of data abstraction: Internal Level, Conceptual or Logical Level or External or View level.The internal schema defines the physical storage structure of the database.The conceptual schema describes the Database structure of the whole database for the community of users.

What is schema and types of schema?

Schema is the overall description of the database. The basic structure of how the data will be stored in the database is called schema. Schema is of three types: Logical Schema, Physical Schema and view Schema.

What are the three levels of schema?

A framework for managing access to data that involves three layers or schemas: the external or programming view, the conceptual or data administration view, and the internal or database administration view.