makedate
description
Syntax
DATE MAKEDATE(INT year, INT dayofyear)
返回指定年份和dayofyear构建的日期。dayofyear必须大于0，否则结果为空。
example
mysql> select makedate(2021,1), makedate(2021,100), makedate(2021,400);
+-------------------+---------------------+---------------------+
| makedate(2021, 1) | makedate(2021, 100) | makedate(2021, 400) |
+-------------------+---------------------+---------------------+
| 2021-01-01 | 2021-04-10 | 2022-02-04 |
+-------------------+---------------------+---------------------+keywords
MAKEDATE