TO_DAYS() Function Examples

In this MySQL TO_DAYS() tutorial, we would love to share with you how to use MySQL TO_DAYS() function with various examples. Today we are going to show you uses and syntax of TO_DAY() function with examples.

MySQL TO_DAYS() Function

Using the TO_DAYS () function in MySQL, to know how many days have elapsed since 0 days for a particular date. For e.g., you can give this function today’s date, and how many days it will return for 0 days.

Syntax

The basic syntax of MySQL to_days() is:

TO_DAYS(date)

Here is the date of use in date calculations.

Now we take a few examples for demonstration

Example-1

We take the first example of the to_day functions for demostration.

SELECT TO_DAYS('2000-12-31');

Output-1

+-----------------------+
| TO_DAYS('2000-12-31') |
+-----------------------+
|                730850 |
+-----------------------+

Note: Note however that the MySQL documentation advises that this function is not for use with those values ??that were before the arrival of the Gregorian calendar (1582).

Example-2

we take the second example with a curdate() of MySQL.

    SELECT 
    CURDATE(),
    TO_DAYS(CURDATE());

Output-2

+------------+--------------------+
| CURDATE()  | TO_DAYS(CURDATE()) |
+------------+--------------------+
| 2019-07-16 |             737621 |
+------------+--------------------+

First of all, we use the MySQL CURDATE () function to return the current date, after that, we pass that function to the TO_DAYS () function to return the number of days that day 0 is.

Example-3

TO_DAYS() v/s FROM_DAYS()

Contrary to the FROM_DAYS () function TO_DAYS (), which returns the number of days, given a date. Here’s an example to display the relationship between FROM_DAYS () and TO_DAYS () functions:

    SELECT 
    CURDATE(),
    TO_DAYS(CURDATE()),
    FROM_DAYS(TO_DAYS(CURDATE()));

Output-3

+------------+--------------------+-------------------------------+
| CURDATE()  | TO_DAYS(CURDATE()) | FROM_DAYS(TO_DAYS(CURDATE())) |
+------------+--------------------+-------------------------------+
| 2019-07-16 |             737621 |  2019-07-16                   |
+------------+--------------------+-------------------------------+

So in this example, we use TO_DAYS () to return the number of days from the current date. Then I use FROM_DAYS () to return the date from that value (which, as expected, returns to the original value of CURDATE ()).

Example-4

we take another example with a now() function of MySQL. Before we use curdate() function of mysql with to_days function. Curdate() is used to return the current date and now() is used to return the current date with time.

    SELECT 
    NOW(),
    TO_DAYS(NOW());

Output-4

+------------------------+--------------------+
| NOW()                  | TO_DAYS(CURDATE()) |
+------------------------+--------------------+
| 2019-07-16 18:10:45    |             737621 |
+------------+--------------------------------+

First of all, we use the MySQL NOW() function to return the current date and time value, after that, we pass that function to the TO_DAYS () function to return the number of days that day 0 is.

Conclusion

Here, you have learned how to use MySQL TO_DAYS() function. You have also learned different FROM_DAYS () and TO_DAYS () function of MySQL.