... the employees’ last names. Introduction to Oracle9i: SQL 3-61Practice 3, Part 2 6. For each employee, display the employee’ s last name, and calculate the number of months between today and ... with ROLLUP and CUBE Operators 17-6ROLLUP Operator 17-7ROLLUP Operator Example 17-8CUBE Operator 17-9CUBE Operator: Example 17-10GROUPING Function 17-11GROUPING Function: Example 17-12GROUPING ... Introduction to Oracle9i: SQL 3-59Practice 3, Part 11. Write a query to display the current date. Label the column Date.2. For each employee, display the employee ID number,...