What are the 3 types of schema?

Question

Schema is of three types: Logical Schema, Physical Schema and view Schema. Logical Schema – It describes the database designed at logical level. Physical Schema – It describes the database designed at physical level. View Schema – It defines the design of the database at the view level.

What are the 3 levels in 3 schema architecture?

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.

What are the types of schema?

Types of schemasRole schema.Object schema.Self-schema.Event schema.What Are the Four Types of Schema in Psychology? - MedicineNet

What are the three main components of the conceptual schema?

The notion of a three-schema model consisting of a conceptual model, an external model, and an internal or physical model was first introduced by the ANSI/X3/SPARC Standards Planning and Requirements Committee directed by Charles Bachman in 1975.

What are the 3 schemas defined as part of the ANSI Sparc 3 schema model?

In 1971, DBTG(DataBase Task Group) realized the requirement for a two-level approach having views and schema and afterward, in 1975, ANSI-SPARC realized the need for a three-level approach with the three levels of abstraction comprises of an external, a conceptual, and an internal level.

Expert · Answer