CREATE TABLE Customers_cards (customer_id VARCHAR)
CREATE TABLE Customers (customer_id VARCHAR, customer_first_name VARCHAR, customer_last_name VARCHAR)

How many cards does customer Art Turcotte have?
SELECT COUNT(*) FROM Customers_cards AS T1 JOIN Customers AS T2 ON T1.customer_id = T2.customer_id WHERE T2.customer_first_name = "Art" AND T2.customer_last_name = "Turcotte"
SELECT COUNT(*) FROM "Customers_cards" AS "T1" JOIN "Customers" AS "T2" ON "Art" = "T2"."customer_first_name" AND "T1"."customer_id" = "T2"."customer_id" AND "T2"."customer_last_name" = "Turcotte"