Table schema:
CREATE TABLE enroll (class_code VARCHAR); CREATE TABLE CLASS (class_code VARCHAR, crs_code VARCHAR); CREATE TABLE course (dept_code VARCHAR, crs_code VARCHAR); CREATE TABLE department (dept_name VARCHAR, dept_code VARCHAR)

Question: What is the name of the department that has the largest number of students enrolled?
SQL: SELECT T4.dept_name 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 GROUP BY T3.dept_code ORDER BY COUNT(*) DESC LIMIT 1