1. What is the difference between DML and DDL commands? Provide an example of each 2. Why would you use a GROUP BY clause in a SELECT statement? 3. Explain the difference between SELECT launch_dt, MAX(price) GROUP BY launch_dt ORDER BY launch_dt; And SELECT launch_dt, MAX(price) ORDER BY launch_dt; 4. What is the difference between a primary key and a foreign key in SQL? 5. What is AUTOCOMMIT=0? 6. If I made a mistake in a column name while creating a table, how could I fix it? 7. What is DESCRIBE command? 8. What is the difference between HAVING and WHERE clause? 9. What is a wildcard in a SELECT statement? Provide an example 10. Why would you join tables? What is the difference between inner join and an outer join? Explain using examples