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MAKEDATE

Create a date from a year and day of year. This function constructs a DATE value given a year and the day number within that year.

Syntax

MAKEDATE(year,dayofyear)

Description

Returns a date, given year and day-of-year values. dayofyear must be greater than 0 or the result is NULL.

Examples

2012 is a leap year:

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SELECT MAKEDATE(2011,31), MAKEDATE(2011,32);
+-------------------+-------------------+
| MAKEDATE(2011,31) | MAKEDATE(2011,32) |
+-------------------+-------------------+
| 2011-01-31        | 2011-02-01        |
+-------------------+-------------------+

SELECT MAKEDATE(2011,365), MAKEDATE(2012,365);
+--------------------+--------------------+
| MAKEDATE(2011,365) | MAKEDATE(2012,365) |
+--------------------+--------------------+
| 2011-12-31         | 2012-12-30         |
+--------------------+--------------------+

SELECT MAKEDATE(2011,366), MAKEDATE(2012,366);
+--------------------+--------------------+
| MAKEDATE(2011,366) | MAKEDATE(2012,366) |
+--------------------+--------------------+
| 2012-01-01         | 2012-12-31         |
+--------------------+--------------------+

SELECT MAKEDATE(2011,0);
+------------------+
| MAKEDATE(2011,0) |
+------------------+
| NULL             |
+------------------+