Learn how to make MySQL DATEDIFF inclusive of end dates. Our MySQL Support team is here to help you with your questions and concerns.

MySQL DATEDIFF Inclusive of Enddates

Understanding how to work with dates in MySQL makes it easier to deal with databases. This comes in handy especially if we have to make calculations based on date differences.

One useful function is DATEDIFF() in MySQL. It calculates the number of days between two dates or datetimes.

Let’s take a look at how this function works and explore some examples.

DATEDIFF(expr1, expr2);

By default, DATEDIFF() calculates the difference between two dates exclusive of the end date. This means that if you calculate the difference between two dates, it doesn’t count the end date in the difference.

For example, consider the following query:

SELECT DATEDIFF('2024-03-22', '2024-03-20');

This query will return 2, because it calculates the difference between the two dates, not including March 22, 2024, in the count.

But what if you want to include the end date in the difference calculation? Fear not, we can easily adjust your query accordingly. One easy way to do this is by adding 1 to the result of DATEDIFF.

Let’s see it in action:

SELECT DATEDIFF('2024-03-22', '2024-03-20') + 1;

This will return 3, which includes March 22, 2024, in the count.

So, to make DATEDIFF inclusive, we simply add 1 to the result if we want to include both the start and end dates in the calculation.

At the end of the day, the MySQL DATEDIFF() function is a helpful tool for calculating date differences. Understanding its behavior, especially regarding the inclusion or exclusion of end dates, helps us with accurate date-based calculations in our database queries.

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Conclusion

In brief, our Support Experts demonstrated how to make MySQL DATEDIFF inclusive of end dates.