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What is schema and sub-schema?
The schema is the physical arrangement of the data as it appears in the DBMS. The subschema is the logical view of the data as it appears to the application program.
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What are schemas?
The schema is the physical arrangement of data.An XML schema is a description of a type of XML document, typically expressed in terms of constraints on the structure and content of documents of that...
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What is schema?
Network+ Schema - the description of object types, or classes, and their required and optional attributes that are stored in an NOSs directory
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A. What is the different between conceptual schema and external schema?
An External Schema is to support views of data and to provide programmers with easier data access, whereas a Conceptual Schema is the schematics of the Programme. It describes the things that are...
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Basic differences between conceptual schema and a physical schema?
Conceptual - a model that captured the essential data that needed to be stored and the relationships between elements * Physical - the on disk representation of data that accounts for layout,...