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# FLOAT



#### Syntax {#syntax}


```
FLOAT( expression )
```

#### Description {#description}
Converts the `expression` expression to fractional number format according to the following rules:

| Type                                          | Value                                                                                                                                                                                                             |
|:----------------------------------------------|:------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| <code>Fractional number &#124; Integer</code> | Original value.                                                                                                                                                                                                   |
| <code>Date &#124; Datetime</code>             | [Unix time](https://en.wikipedia.org/wiki/Unix_time) corresponding to the date and time. If the value contains time zone data, it's used in the calculation. If the time zone is unknown, the time is set in UTC. |
| `String`                                      | A number from a decimal string.                                                                                                                                                                                   |
| `Boolean`                                     | `TRUE` — `1.0`, `FALSE` — `0.0`.                                                                                                                                                                                  |

**Argument types:**
- `expression` — `Boolean | Date | Datetime | Fractional number | Integer | String`


**Return type**: `Fractional number`

#### Examples {#examples}

```
FLOAT(7) = 7.0
```

```
FLOAT("34.567") = 34.567
```

```
FLOAT(TRUE) = 1.0
```


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

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