What are the 3 levels of schema architecture?

Question

Three Schema Architecture of DBMS External or View level: This is the highest level of database abstraction. . Conceptual or Logical level: The conceptual level describes the structure of the whole database. . Internal or Physical level: This is the lowest level of database abstraction.

What are the 3 levels in 3 schema architecture?

The three levels present in this architecture are Physical level, Conceptual level and External level.

What are the 3 types of schema?

The three-schema approach provides for three types of schemas with schema techniques based on formal language descriptions:External schema for user views.Conceptual schema integrates external schemata.Internal schema that defines physical storage structures.

What are 3 types of DBMS architecture?

To understand the structure of DBMS, they are classified into three types based on their build architecture:One-Tier Architecture. ... Two-Tier Architecture. ... Three-Tier Architecture. ... Hierarchical Model. ... Network Model. ... Relational Model.

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