Immediate Food Delivery Percentage

If the customer's preferred delivery date is the same as the order date, then the order is called "immediate"; otherwise, it is called "scheduled". The first order of a customer is the order with the earliest order date that the customer made. It is guaranteed that a customer has precisely one first order. Write an SQL query to find the percentage of immediate orders in the first orders of all customers, rounded to 2 decimal places. ### Schema: `Delivery` | Column Name | Type | | :--- | :--- | | delivery_id | int | | customer_id | int | | order_date | date | | customer_pref_delivery_date | date |