How can we compare the difference in days between two dates in MySQL?

In MySQL, you can use the DATEDIFF function to compare the difference between two dates.

The syntax is as follows:
DATEDIFF(date1, date2)

date1 and date2 are two dates to be compared, which can be either date fields, date text, or dates obtained using date functions.

Suppose there is a table called orders, with a field called order_date representing the date of the order. Now we want to calculate the number of days between the current date and the order date.

You can use the following query:
SELECT DATEDIFF(CURDATE(), order_date) AS day_diff
FROM orders

The CURDATE() function is used to retrieve the current date, with order_date representing the order date field in the table.

After running the above query, a field named day_diff will be returned, indicating the number of days difference between the current date and the order date.