Given the following schema:
employees(emp-id, first-name, last-name, hire-date, dept-id, salary)
departments(dept-id, dept-name, manager-id, location-id)
You want to display the last names and hire dates of all latest hires in their respective departments in the location $\text{ID 1700.}$ You issue the following query:
SQL>SELECT last-name, hire-date
FROM employees
WHERE (dept-id, hire-date) IN
(SELECT dept-id, MAX(hire-date)
FROM employees JOIN departments USING(dept-id)
WHERE location-id =1700
GROUP BY dept-id);
What is the outcome?
- It executes but does not give the correct result
- It executes and gives the correct result.
- It generates an error because of pairwise comparison.
- It generates an error because of the GROUP BY clause cannot be used with table joins in a sub-query.