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

  1. > 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

  1. drop table if exists t1;
  2. create table t1(a date, b datetime,c varchar(30));
  3. insert into t1 values('2022-01-01','2022-01-01 01:01:01','2022-01-01 01:01:01');
  4. insert into t1 values('2022-01-01','2022-01-01 01:01:01','2022-01-01 01:01:01');
  5. insert into t1 values('20220101','2022-01-01 01:01:01','2022-13-13 01:01:01');
  6. insert into t1 values('2022-01-02','2022-01-02 23:01:01','2022-01-01 23:01:01');
  7. insert into t1 values('2021-12-31','2021-12-30 23:59:59','2021-12-30 23:59:59');
  8. insert into t1 values('2022-06-30','2021-12-30 23:59:59','2021-12-30 23:59:59');
  10. mysql> select distinct dayofyear(a) as dya from t1;
  11. +------+
  12. | dya  |
  13. +------+
  14. |    1 |
  15. |    2 |
  16. |  365 |
  17. |  181 |
  18. +------+
  19. 4 rows in set (0.00 sec)
  21. mysql> select * from t1 where dayofyear(a)>120;
  22. +------------+---------------------+---------------------+
  23. | a          | b                   | c                   |
  24. +------------+---------------------+---------------------+
  25. | 2021-12-31 | 2021-12-30 23:59:59 | 2021-12-30 23:59:59 |
  26. | 2022-06-30 | 2021-12-30 23:59:59 | 2021-12-30 23:59:59 |
  27. +------------+---------------------+---------------------+
  28. 2 rows in set (0.01 sec)
  30. mysql> select * from t1 where dayofyear(a) between 1 and 184;
  31. +------------+---------------------+---------------------+
  32. | a          | b                   | c                   |
  33. +------------+---------------------+---------------------+
  34. | 2022-01-01 | 2022-01-01 01:01:01 | 2022-01-01 01:01:01 |
  35. | 2022-01-01 | 2022-01-01 01:01:01 | 2022-01-01 01:01:01 |
  36. | 2022-01-01 | 2022-01-01 01:01:01 | 2022-13-13 01:01:01 |
  37. | 2022-01-02 | 2022-01-02 23:01:01 | 2022-01-01 23:01:01 |
  38. | 2022-06-30 | 2021-12-30 23:59:59 | 2021-12-30 23:59:59 |
  39. +------------+---------------------+---------------------+
  40. 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。