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DATE()

Description

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

Syntax

> DATE(expr)

Arguments

Arguments Description
expr Required. The date/datetime to extract the date from.

Examples

> drop table if exists t1;
> create table t1(a date, b datetime);
> insert into t1 values('2022-01-01','2022-01-01 01:01:01');
> insert into t1 values('2022-01-01','2022-01-01 01:01:01');
> insert into t1 values(20220101,'2022-01-01 01:01:01');
> insert into t1 values('2022-01-02','2022-01-02 23:01:01');
> insert into t1 values('2021-12-31','2021-12-30 23:59:59');
> insert into t1 values('2022-06-30','2021-12-30 23:59:59');
> select date(a),date(b) from t1;
+------------+------------+
| date(a)    | date(b)    |
+------------+------------+
| 2022-01-01 | 2022-01-01 |
| 2022-01-01 | 2022-01-01 |
| 2022-01-01 | 2022-01-01 |
| 2022-01-02 | 2022-01-02 |
| 2021-12-31 | 2021-12-30 |
| 2022-06-30 | 2021-12-30 |
+------------+------------+
> select date(a),date(date(a)) as dda from t1;
+------------+------------+
| date(a)    | dda        |
+------------+------------+
| 2022-01-01 | 2022-01-01 |
| 2022-01-01 | 2022-01-01 |
| 2022-01-01 | 2022-01-01 |
| 2022-01-02 | 2022-01-02 |
| 2021-12-31 | 2021-12-31 |
| 2022-06-30 | 2022-06-30 |
+------------+------------+

Constraints

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

Currently, MatrixOne doesn't support select function() without from tables.