## Operators for Working with Dates and Times {#operators-datetime}
### EXTRACT {#operator-extract}
```sql
EXTRACT(part FROM date);
```
Extracts a part from a given date. For example, you can retrieve a month from a given date, or a second from a time.
The `part` parameter specifies which part of the date to retrieve. The following values are available:
-`DAY` — The day of the month. Possible values: 1–31.
-`MONTH` — The number of a month. Possible values: 1–12.
-`YEAR` — The year.
-`SECOND` — The second. Possible values: 0–59.
-`MINUTE` — The minute. Possible values: 0–59.
-`HOUR` — The hour. Possible values: 0–23.
The `part` parameter is case-insensitive.
The `date` parameter specifies the date or the time to process. Either [Date](../data_types/date.md) or [DateTime](../data_types/datetime.md) type is supported.
Examples:
```sql
SELECT EXTRACT(DAY FROM toDate('2017-06-15'));
SELECT EXTRACT(MONTH FROM toDate('2017-06-15'));
SELECT EXTRACT(YEAR FROM toDate('2017-06-15'));
```
In the following example we create a table and insert into it a value with the `DateTime` type.
```sql
CREATE TABLE test.Orders
(
OrderId UInt64,
OrderName String,
OrderDate DateTime
)
ENGINE = Log;
```
```sql
INSERT INTO test.Orders VALUES (1, 'Jarlsberg Cheese', toDateTime('2008-10-11 13:23:44'));
You can see more examples in [tests](https://github.com/ClickHouse/ClickHouse/blob/master/dbms/tests/queries/0_stateless/00619_extract.sql).
### INTERVAL {#operator-interval}
Creates an [Interval](../data_types/special_data_types/interval.md)-type value that should be used in arithmetical operations with [Date](../data_types/date.md) and [DateTime](../data_types/datetime.md)-type values.
Example:
```sql
SELECT now() AS current_date_time, current_date_time + INTERVAL 4 DAY + INTERVAL 3 HOUR
