Table schema:
CREATE TABLE CMI_Cross_References (cmi_cross_ref_id VARCHAR, master_customer_id VARCHAR); CREATE TABLE Business_Rates (cmi_cross_ref_id VARCHAR)

Question: How many business rates are related to each cmi cross reference? List cross reference id, master customer id and the n
SQL: SELECT T2.cmi_cross_ref_id, T2.master_customer_id, COUNT(*) FROM Business_Rates AS T1 JOIN CMI_Cross_References AS T2 ON T1.cmi_cross_ref_id = T2.cmi_cross_ref_id GROUP BY T2.cmi_cross_ref_id