# Supported data types
<a name="supported-data-types"></a>

AWS IoT SiteWise query language supports the following data types.


**Scalar value**  

|  **Data type**  |  **Description**  | 
| --- | --- | 
| `STRING` | A string of maximum length 1024 bytes. | 
| `INTEGER` | A signed 32-bit integer with a range from `-2,147,483,648 to 2,147,483,647` . | 
| `DOUBLE` | A floating point number with range from `–10^100 to 10^100`, or `Nan` with `IEEE 754` double precision. | 
| `BOOLEAN` | `true` or `false`. | 
| `TIMESTAMP` | ISO-8601 compliant timestamps:[See the AWS documentation website for more details](http://docs.aws.amazon.com/iot-sitewise/latest/userguide/supported-data-types.html) | 

**Note**  
`Null`: A boolean `true` indicating a lack of defined data.

**Example**  
`TIMESTAMP` value examples:  

```
TIMESTAMP '2025-12-21 23:59:59.999Z'
TIMESTAMP '2025-12-21 23:59:59+23:59'
'2025-12-21 23:59:59'
'2025-12-21T23:59:59.123+11:11'
```

**Note**  
 The double precision data is not exact. Some values are not converted exactly, and will not represent all real numbers due to limited precision. Floating-point data in the query may not be the same value represented internally. The value is rounded if the precision of an input number is too high.