Skip to main content
SQL • LESSON 131

Date Difference

How can we calculate delivery duration in days between two dates?

Advanced3 Minutes1440 XP
🤔 THE QUESTION

How can we calculate delivery duration in days between two dates?

💡 WHAT IS IT?

Subtracting order date from delivery date calculates fulfillment latency in days.

🎯 WHAT IS IT USED FOR?

Delivery SLA tracking, turnaround time analysis, shipping duration metrics.

💻 EXAMPLE
SELECT
order_id,
order_date,
delivery_date,
delivery_date - order_date AS delivery_days
FROM orders;

🎯 Mission Objectives

Practice typing production-grade SQL code for Date Difference.

  • Date subtraction
  • Duration in days
  • Fulfillment SLA
  • Shipping metrics