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Q1. What do you mean by the term data redundancy? Illustrate the demerits of having redundancy in a database?

Q2. Illustrate the difference between the logical data independence and physical data independence?

Q3. List all the different cases where use of a NULL value would be suitable.

Q4. When a query language is termed as relationally complete?

Q5. Illustrate the difference between the WHERE and HAVING clause?

Q6. Why must NULLs in a relation be ignored as far as possible?

Q7. Illustrate the transaction commit points and why are they significant?

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