CREATE TABLE view_product_availability (product_id VARCHAR(255), available_yn VARCHAR(255)); CREATE TABLE products_for_hire (product_name VARCHAR(255), product_id VARCHAR(255))
What are the names of products whose availability equals to 1?
    
SQL: SELECT T2.product_name FROM view_product_availability AS T1 JOIN products_for_hire AS T2 ON T1.product_id = T2.product_id WHERE T1.available_yn = 1