1. What is meant by logical independence?
2. Explain the term second normal form.
3. How are comparisons done on character string data in a query's WHERE clause, and why would this be especially useful in comparing certain attributes?
4. In using group functions, we cannot place a group function in a WHERE clause. Explain how the WHERE clause and HAVING clause are similar and why you can use the HAVING with a group function but not a WHERE clause.
5. Write the SQL statement that will remove the database table EMPLOYEE.