DATEDIFF in MySQL - Examples & AI Generator

Working with dates in MySQL can be tricky, especially when you need to calculate the difference between two dates using DATEDIFF. Remembering the exact MySQL DATEDIFF syntax—and how it differs from other databases—can slow you down. With AI2sql, you skip the memorization and coding: just describe your date difference need, and receive a ready-to-run query in 10 seconds—no SQL expertise required.

DATEDIFF Syntax in MySQL

The DATEDIFF function in MySQL returns the number of days between two date values. Note: In MySQL, the order of dates matters (first is the end date, second is the start date):

DATEDIFF(date1, date2)

• date1: The later date (end date)

• date2: The earlier date (start date)

DATEDIFF Examples You Can Generate Instantly

1. Days Since Customer Registered

SELECT customer_id, DATEDIFF(CURDATE(), registration_date) AS days_since_registration
FROM customers;

• Use case: Analyze customer lifecycle or target recent signups.

2. Unshipped Order Age

SELECT order_id, DATEDIFF(CURDATE(), order_date) AS days_pending
FROM orders
WHERE status = 'Pending';

• Use case: Flag orders waiting too long to be processed.

3. Product Warranty Time Remaining

SELECT product_id, customer_id,
       DATEDIFF(warranty_expiry, CURDATE()) AS days_left
FROM product_registrations;

• Use case: Notify customers before warranties expire.

Generate DATEDIFF queries in 10 seconds with AI2sql.

Why Use AI2sql Instead of Manual DATEDIFF Coding

• No coding required: Describe your logic, get instant SQL for MySQL’s DATEDIFF.

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FAQ: DATEDIFF in MySQL

How is DATEDIFF in MySQL different from SQL Server?

In MySQL, DATEDIFF returns the days between dates and only supports days (no units argument). SQL Server's DATEDIFF supports various units (days, months, years).

Does DATEDIFF count time or just dates?

In MySQL, only the date portion is considered—even if the columns include time. Times are ignored.

Can I use DATEDIFF with DATETIME values?

Yes, but only the date part (not the time) is used for the calculation.

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Conclusion: Mastering DATEDIFF in MySQL means understanding both syntax and business context—but you don’t have to memorize anything. With AI2sql, generate production-ready MySQL DATEDIFF queries in 10 seconds, getting you from question to insight instantly. Generate Your First Query Now.