DATE()

Description

Extracts the date part of the date or datetime expression expr.

Syntax

1. > DATE(expr)

Arguments

Examples

1. drop table if exists t1;
2. create table t1(a date, b datetime);
3. insert into t1 values('2022-01-01','2022-01-01 01:01:01');
4. insert into t1 values('2022-01-01','2022-01-01 01:01:01');
5. insert into t1 values(20220101,'2022-01-01 01:01:01');
6. insert into t1 values('2022-01-02','2022-01-02 23:01:01');
7. insert into t1 values('2021-12-31','2021-12-30 23:59:59');
8. insert into t1 values('2022-06-30','2021-12-30 23:59:59');

10. mysql> select date(a),date(b) from t1;
11. +------------+------------+
12. | date(a)    | date(b)    |
13. +------------+------------+
14. | 2022-01-01 | 2022-01-01 |
15. | 2022-01-01 | 2022-01-01 |
16. | 2022-01-01 | 2022-01-01 |
17. | 2022-01-02 | 2022-01-02 |
18. | 2021-12-31 | 2021-12-30 |
19. | 2022-06-30 | 2021-12-30 |
20. +------------+------------+
21. 5 rows in set (0.01 sec)

23. mysql> select date(a),date(date(a)) as dda from t1;
24. +------------+------------+
25. | date(a)    | dda        |
26. +------------+------------+
27. | 2022-01-01 | 2022-01-01 |
28. | 2022-01-01 | 2022-01-01 |
29. | 2022-01-01 | 2022-01-01 |
30. | 2022-01-02 | 2022-01-02 |
31. | 2021-12-31 | 2021-12-31 |
32. | 2022-06-30 | 2022-06-30 |
33. +------------+------------+
34. 5 rows in set (0.00 sec)

Constraints

The date type supports only yyyy-mm-dd and yyyymmdd for now.