Question

internal level /schema example​

Answer 1

Answer:

the internal level has internal scheme which describe the physical storage structure of the database.

Answer 2

Answer:

1. Conceptual/Internal Mapping:

The conceptual/internal mapping defines the correspondence between the conceptual view and the store database.

1. Conceptual/Internal Mapping:

The conceptual/internal mapping defines the correspondence between the conceptual view and the store database.

It specifies how conceptual record and fields are represented at the internal level.

It relates conceptual schema with internal schema.

If structure of the store database is changed.

If changed is made to the storage structure definition-then the conceptual/internal mapping must be changed accordingly, so that the conceptual schema can remain invariant.

There could be one mapping between conceptual and internal levels.

Hope it helps

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