3. How do you use the MERGE statement in databases, and in what scenarios might it be advantageous over separate INSERT, UPDATE, and DELETE statements?

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3. How do you use the MERGE statement in databases, and in what scenarios might it be advantageous over separate INSERT, UPDATE, and DELETE statements?
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Solution 1

The MERGE statement in SQL is used to insert, update, or delete records from a table by combining those operations. It is often used when you need to synchronize two tables, and it can be more efficient than separate INSERT, UPDATE, and DELETE statements because it processes the table only once.

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