1: Explain the concept of a LEFT JOIN.
2: What is a RIGHT JOIN in SQL?
3: How do you perform a full outer join?
4: What is a subquery in SQL?
5: How do you write a nested query?
6: What is the purpose of the UNION operator?
7: How do you use the DISTINCT keyword?
8: What is a view in SQL?
9: How do you create a view in SQL?
10: What is the purpose of indexes in SQL?
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