DAYOFYEAR()

函数说明

返回日期所对应在一年中的天数，返回值在 1-366 之间。

函数语法

> DAYOFYEAR(expr)

参数释义

参数	说明
expr	必要参数。需要提取天数的 date 格式的输入值

示例

drop table if exists t1;
create table t1(a date, b datetime,c varchar(30));
insert into t1 values('2022-01-01','2022-01-01 01:01:01','2022-01-01 01:01:01');
insert into t1 values('2022-01-01','2022-01-01 01:01:01','2022-01-01 01:01:01');
insert into t1 values(20220101,'2022-01-01 01:01:01','2022-13-13 01:01:01');
insert into t1 values('2022-01-02','2022-01-02 23:01:01','2022-01-01 23:01:01');
insert into t1 values('2021-12-31','2021-12-30 23:59:59','2021-12-30 23:59:59');
insert into t1 values('2022-06-30','2021-12-30 23:59:59','2021-12-30 23:59:59');

mysql> select distinct dayofyear(a) as dya from t1;
+------+
| dya  |
+------+
|    1 |
|    2 |
|  365 |
|  181 |
+------+
4 rows in set (0.00 sec)

mysql> select * from t1 where dayofyear(a)>120;
+------------+---------------------+---------------------+
| a          | b                   | c                   |
+------------+---------------------+---------------------+
| 2021-12-31 | 2021-12-30 23:59:59 | 2021-12-30 23:59:59 |
| 2022-06-30 | 2021-12-30 23:59:59 | 2021-12-30 23:59:59 |
+------------+---------------------+---------------------+
2 rows in set (0.01 sec)

mysql> select * from t1 where dayofyear(a) between 1 and 184;
+------------+---------------------+---------------------+
| a          | b                   | c                   |
+------------+---------------------+---------------------+
| 2022-01-01 | 2022-01-01 01:01:01 | 2022-01-01 01:01:01 |
| 2022-01-01 | 2022-01-01 01:01:01 | 2022-01-01 01:01:01 |
| 2022-01-01 | 2022-01-01 01:01:01 | 2022-13-13 01:01:01 |
| 2022-01-02 | 2022-01-02 23:01:01 | 2022-01-01 23:01:01 |
| 2022-06-30 | 2021-12-30 23:59:59 | 2021-12-30 23:59:59 |
+------------+---------------------+---------------------+
4 rows in set (0.00 sec)

限制

目前 DAYOFYEAR() 只支持 date 类型。
目前 date 格式只支持 yyyy-mm-dd 和 yyyymmdd 的数据格式。