[Yandex Cloud documentation](../../index.md) > [Yandex DataLens](../index.md) > Calculated fields > Function reference > Operators > OR

# OR



#### Syntax {#syntax}


```
value_1 OR value_2
```

#### Description {#description}
Performs a Boolean join of two expressions with the `OR` condition.

**Argument types:**
- `value_1` — `Boolean`
- `value_2` — `Boolean`


**Return type**: Same type as (`value_1`, `value_2`)

{% note info %}

Arguments (`value_1`, `value_2`) must be of the same type.

{% endnote %}


#### Example {#examples}

```
[Month] = "January" OR [Year] < 2019
```


#### Data source support {#data-source-support}

`ClickHouse 21.8`, `Files`, `Google Sheets`, `Yandex Metrica`, `Microsoft SQL Server 2017 (14.0)`, `MySQL 5.7`, `Oracle Database 12c (12.1)`, `PostgreSQL 9.3`, `Trino`, `Yandex Documents`, `YDB`.