How many sections does each course has?
SELECT count(*) ,  crs_code FROM CLASS GROUP BY crs_code
SELECT count(*) ,  crs_code FROM CLASS GROUP BY crs_code
[{'count(*)': 3, 'CRS_CODE': 'ACCT-211'}, {'count(*)': 2, 'CRS_CODE': 'ACCT-212'}, {'count(*)': 3, 'CRS_CODE': 'CIS-220'}, {'count(*)': 1, 'CRS_CODE': 'CIS-420'}, {'count(*)': 2, 'CRS_CODE': 'QM-261'}, {'count(*)': 2, 'CRS_CODE': 'QM-362'}]