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# AWS::IoTAnalytics::Datastore SchemaDefinition
<a name="aws-properties-iotanalytics-datastore-schemadefinition"></a>

Information needed to define a schema.

## Syntax
<a name="aws-properties-iotanalytics-datastore-schemadefinition-syntax"></a>

To declare this entity in your CloudFormation template, use the following syntax:

### JSON
<a name="aws-properties-iotanalytics-datastore-schemadefinition-syntax.json"></a>

```
{
  "[Columns](#cfn-iotanalytics-datastore-schemadefinition-columns)" : [ Column, ... ]
}
```

### YAML
<a name="aws-properties-iotanalytics-datastore-schemadefinition-syntax.yaml"></a>

```
  [Columns](#cfn-iotanalytics-datastore-schemadefinition-columns): 
    - Column
```

## Properties
<a name="aws-properties-iotanalytics-datastore-schemadefinition-properties"></a>

`Columns`  <a name="cfn-iotanalytics-datastore-schemadefinition-columns"></a>
Specifies one or more columns that store your data.  
Each schema can have up to 100 columns. Each column can have up to 100 nested types.  
*Required*: No  
*Type*: Array of [Column](aws-properties-iotanalytics-datastore-column.md)  
*Minimum*: `1`  
*Maximum*: `100`  
*Update requires*: [No interruption](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)