How Can MySQL's DATEDIFF Function Calculate the Difference Between Two Dates?

Calculating the Date Difference in MySQL

In database management, it's often necessary to determine the number of days between two dates. In MySQL, the DATEDIFF function provides an elegant solution for this task.

Problem Statement

Consider the following scenario:

• Check-in date: 12-04-2010
• Check-out date: 15-04-2010

You need to determine the number of days between these two dates.

Solution

The DATEDIFF function calculates the date difference by subtracting the first expression from the second expression and returning the result in days. For example, to calculate the difference between the check-out date and the check-in date, you would use the following expression:

SELECT DATEDIFF('2010-04-15', '2010-04-12');

Explanation

• '2010-04-15' represents the check-out date.
• '2010-04-12' represents the check-in date.

The result of this expression would be 3, as there are three days between April 12th and April 15th.

Note

It's important to note that the dates in the DATEDIFF function must be written in the format YYYY-MM-DD. For example, instead of '04-15-2010', you would write '2010-04-15'.

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