Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE CLASS (crs_code VARCHAR); CREATE TABLE course (dept_code VARCHAR, crs_credit INTEGER, crs_code VARCHAR)
### Question:
Find the total credits of all classes offered by each department.
### Answer:
SELECT SUM(T1.crs_credit), T1.dept_code FROM course AS T1 JOIN CLASS AS T2 ON T1.crs_code = T2.crs_code GROUP BY T1.dept_code