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The aim of the three-schemes architecture is the separation of the user applications from the physical database, the stored data. Physically the data is only existent on the internal level while other forms of representation are calculated or derived respectively if needed. The DBMS has the task to realize this representation between each of.

1. Internal Floor: One internal level consists of an in schema that is used at describe the physical structure starting the base inbound whose the data is stored. This schema is often called as the physical schema. The internal level uses aforementioned physical product model.

A database schema is a blueprint that outlines a relational database ’s architecture, describing how data is organized within it and how its different elements, like foreign and primary keys, data types, and fields, relate to one another. Typically, database schemas are visually represented using an entity-relationship diagram, which depicts.