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Copy file name to clipboardExpand all lines: articles/time-series-insights/time-series-insights-update-how-to-shape-events.md
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@@ -8,7 +8,7 @@ ms.workload: big-data
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ms.service: time-series-insights
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services: time-series-insights
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ms.topic: conceptual
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ms.date: 02/14/2020
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ms.date: 02/24/2020
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ms.custom: seodec18
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---
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## Column flattening
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During ingestion, payloads that contain nested columns (attributes) will be flattened so that the column name is a single value with a delineator.
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During ingestion, payloads that contain nested objects will be flattened so that the column name is a single value with a delineator.
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* For example, the following nested JSON:
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Let's take a closer look at how to use [Time Series Instance](./time-series-insights-update-tsm.md#time-series-model-instances) to shape your JSON more optimally.
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> [!NOTE]
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> The [Time Series IDs](./time-series-insights-update-how-to-id.md) below *deviceIds*.
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> The [Time Series IDs](./time-series-insights-update-how-to-id.md) below are*deviceIds*.
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```JSON
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[
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]
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```
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Time Series Insights Preview joins a table (after flattening) during query time. The table includes additional columns, such as **Type**. The following example demonstrates [how you can shape](./time-series-insights-send-events.md#supported-json-shapes) your telemetry data.
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Time Series Insights Preview joins a table (after flattening) during query time. The table includes additional columns, such as **Type**.
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## Next steps
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*Read [Azure Time Series Insights Preview query syntax](https://docs.microsoft.com/rest/api/time-series-insights/preview#time-series-expression-and-syntax) to send well-shaped JSON to the [Preview APIs](https://docs.microsoft.com/rest/api/time-series-insights/preview).
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*To put these guidelines into practice, read [Azure Time Series Insights Preview query syntax](./time-series-insights-query-data-csharp.md). You'll learn more about the query syntax for the Time Series Insights [Preview REST API](https://docs.microsoft.com/rest/api/time-series-insights/preview) for data access.
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* Combine JSON best practices with [How to Time Series Model](./time-series-insights-update-how-to-tsm.md).
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