Hello, what is the total number of bookings?
select count ( * ) from bookings
Perfect, and how many different customers were there?
select count ( distinct customer_id ) from bookings
Awesome! And finally, can you list the customer id, first name, and total bookings of each customer?
select t1.customer_id, t1.first_name, count ( * ) from customers as t1 join bookings as t2 on t1.customer_id = t2.customer_id group by t1.customer_id