Question: 1. What is a CROSS JOIN? Give an example of its syntax.
2. What three join types are included in the OUTER JOIN classification?
3. Using tables named T1 and T2, write a query example for each of the three join types you described in Question 2. Assume that T1 and T2 share a common column named C1.
4. What is a subquery, and what are its basic characteristics?