Examine the description of the EMPLOYEES table

You write this failing statement:
SELECT dept_no AS department_id, MAX (salary) As max_sal
FROM employees
WHERE salary >10000
GROUP BY department_id
ORDER BY max_sal;
Which clause causes the error?

For each employee in department 90 you want to display:
1. their last name
2. the number of complete weeks they have been employed
The output must be sorted by the number of weeks, starting with the longest serving employee first.Which statement will accomplish this?

Examine the description of the EMPLOYEES table:

NLS_DATE FORMAT is DD-MON-RR.
Which two queries will execute successfully?

Which two are true about rollbacks?

Which statement will execute successfully?