1 - 4. Write four SQL queries to join two or more tables where each query contains multiple nested single-row functions. Make sure to use different functions in each query. Explain what each query is intended to do.

5. Write a query which is based on a single table and includes the GROUP B statement. Explain what the query is supposed to do.

6. Repeat problem 5 but add the WHERE statement. Explain what the query is supposed to do.

7. Repeat problem 6 but add the HAVING statement. Explain what the query is supposed to do.

8 - 10. Repeat problems 5-7 but use two tables. Explain what each query is supposed to do.

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