TO_DAYS

Description

A date calculation function that converts a date to a numeric value representing days, calculating the total number of days from December 31, year 1 (the reference date) to the specified date.

This function behaves consistently with the to_days function in MySQL.

Syntax

TO_DAYS(`<date_or_date_expr>`)

Parameters

Parameter	Description
<date_or_time_expr>	Input datetime value, supports date/datetime types. For datetime and date formats, please refer to datetime conversion and date conversion

Return Value

Returns BIGINT type representing the number of days.

Examples

--input date type
select to_days('2007-10-07');
+---------------------------------------+
| to_days('2007-10-07') |
+---------------------------------------+
|                                733321 |
+---------------------------------------+

--input datetime type
select to_days('2007-10-07 10:03:09');
+------------------------------------------------+
| to_days('2007-10-07 10:03:09') |
+------------------------------------------------+
|                                         733321 |
+------------------------------------------------+