Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE products_booked (product_id VARCHAR)

### Question ###
What is the id of the product that is booked for 3 times?

### Accurate SQL ###

SELECT product_id FROM products_booked GROUP BY product_id HAVING COUNT(*) = 3