What are the full names and hire dates for employees in the same department as someone with the first name Clara?
SELECT first_name ,  last_name ,  hire_date FROM employees WHERE department_id  =  (SELECT department_id FROM employees WHERE first_name  =  "Clara")
employees in the same department as someone with the first name Clara refers to matching department_id from a sub-query where first_name = 'Clara'; full names refer to concatenation or selection of first_name and last_name; hire dates refer to hire_date;