Grokking SQL for Tech Interviews
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16. Order Fulfillment Rate (Medium)
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Problem Statement

Table: Orders
Each row in this table represents an individual order placed by a customer, detailing the unique order ID, customer ID, and the timestamp when the order was placed.

+---------------+------------+
| Column Name   | Type       | 
+---------------+------------+
| order_id      | int        | 
| customer_id   | int        |
| time_stamp    | datetime   |
+---------------+------------+
order_id is the primary key for this table.

Table: Deliveries

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