can you show me a list of product description?
select product_description from products_for_hire
what are the start date and end of date of the booking that has booked the product named 'book collection A'?
select t3.booking_start_date, t3.booking_end_date from products_for_hire as t1 join products_booked as t2 on t1.product_id = t2.product_id join bookings as t3 on t2.booking_id = t3.booking_id where t1.product_name = 'Book collection A'
what is the average of booked amount?
select avg ( booked_amount ) from products_booked