how many students enrolled for the accounting department
SELECT count ( * )  FROM CLASS AS T1 JOIN enroll AS T2 ON T1.class_code   =   T2.class_code JOIN course AS T3 ON T1.crs_code   =   T3.crs_code JOIN department AS T4 ON T3.dept_code   =   T4.dept_code WHERE T4.dept_name   =   'Accounting'
number of students enrolled in a department refers to COUNT(*); department is specified by dept_name; linking students to departments involves joining tables CLASS, enroll, course, and department on respective keys (class_code, crs_code, dept_code).