Table schema:
CREATE TABLE professor (prof_office VARCHAR, emp_num VARCHAR); CREATE TABLE employee (emp_fname VARCHAR, emp_num VARCHAR)

Question: Find the first names and offices of all professors sorted by alphabetical order of their first name.
SQL: SELECT T2.emp_fname, T1.prof_office FROM professor AS T1 JOIN employee AS T2 ON T1.emp_num = T2.emp_num ORDER BY T2.emp_fname