Table schema:
CREATE TABLE department (dept_code VARCHAR, dept_name VARCHAR); CREATE TABLE professor (dept_code VARCHAR)

Question: How many professors who are from either Accounting or Biology department?
SQL: SELECT COUNT(*) FROM professor AS T1 JOIN department AS T2 ON T1.dept_code = T2.dept_code WHERE T2.dept_name = 'Accounting' OR T2.dept_name = 'Biology'