Question

What is the difference between logical data independence and physical data independence? Which one is harder to achieve? Why? 

    What is the difference between logical data independence and physical data independence? Which one is harder to achieve? Why?
Fundamentals of Database Systems
Fundamentals of Database Systems
Ramez Elmasri,… 7th Edition
Chapter 2, Problem 5 ↓

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This means that changes to the way data is organized and accessed can be made without affecting how users interact with the data.  Show more…

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What is the difference between logical data independence and physical data independence? Which one is harder to achieve? Why?
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