Explain The Difference Of Internal External And Conceptual Schemas How Are These Schema Layers Related To The Concept Of Logical And Physical Data Independence?


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This is the 3 layer architecture of database.

Internal schema refers to the physical storage of data on storage media, as files on magnetic disc or tape.

Conceptual schema is the data structure or the file structure through which the data are accessed. This includes table structure consisting fields.

External schema is the view provided to the user.this is the logical view of the data

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