Difference between primary key and unique key

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Reference no: EM132691641

Answer the following questions in a cohesive and comprehensive essay.

Question 1. What is the difference between the "DELETE" and "TRUNCATE" commands?

Question 2. What is the difference between the "WHERE" clause and the "HAVING" clause?

Question 3. What is the difference between "Primary Key" and "Unique Key"?

Reference no: EM132691641

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