MariaDB FROM_DAYS() Function

The MariaDB FROM_DAYS() function takes a numeric representation of the day and returns a date value.

This function is to be used only with dates within the Gregorian calendar.

Note: The TO_DAYS() function which is the reverse of the FROM_DAYS() function.

FROM_DAYS(numeric_day)

numeric_day Required. Specify the numeric day to convert to a date.

Returns the date converted from numeric days.

The example below shows the usage of FROM_DAYS() function.

SELECT FROM_DAYS(737289);
Result: '2018-08-18'

SELECT FROM_DAYS(737290);
Result: '2018-08-19'

SELECT FROM_DAYS(737291);
Result: '2018-08-20'

Consider a database table called Employee with the following records:

EmpID	Name	City	Age	Numeric DOJ
1	John	London	25	737204
2	Marry	New York	24	737347
3	Jo	Paris	27	737584
4	Kim	Amsterdam	30	737688
5	Ramesh	New Delhi	28	737722
6	Suresh	Mumbai	28	738515

The statement given below can be used to convert the records of column [Numeric DOJ] into a date:

SELECT *, FROM_DAYS(`Numeric DOJ`) AS Date_of_Joining FROM Employee;

This will produce the result as shown below:

EmpID	Name	City	Age	Numeric DOJ	Date_of_Joining
1	John	London	25	737204	2018-05-25
2	Marry	New York	24	737347	2018-10-15
3	Jo	Paris	27	737584	2019-06-09
4	Kim	Amsterdam	30	737688	2019-09-21
5	Ramesh	New Delhi	28	737722	2019-10-25
6	Suresh	Mumbai	28	738515	2021-12-26