query: SELECT card_type_code ,  count(DISTINCT customer_id) FROM Customers_cards GROUP BY card_type_code
question: What-what do be a different card type code, and so how many different customer holds em type?
query_toks: SELECT card_type_code , count ( DISTINCT customer_id ) FROM Customers_cards GROUP BY card_type_code
query_toks_no_value: select card_type_code , count ( distinct customer_id ) from customers_cards group by card_type_code
question_toks: What-what do be a different card type code, and so how many different customer holds em type?