---
id: pie-charts
title: Pie Charts
description: Donut or Pie charts are useful for visually comparing the percentage of events that have occurred for a particular field.
slug: /help/docs/dashboards/panels/pie-charts/
canonical: https://www.sumologic.com/help/docs/dashboards/panels/pie-charts/
---
import useBaseUrl from '@docusaurus/useBaseUrl';
Pie charts are useful for visually comparing the percentage of events that have occurred, such as the type of error that occurs the most in your system. A pie chart will compare different values for the same field. If you want to compare values for different fields consider using a histogram.
To create a pie chart, use an aggregate query that provides at least a few results in the **Aggregates** tab.
For example, you'd use the following simple query to get results from your logs:
```sumo
(error OR fail*) AND exception | count by _sourceCategory | sort by _count
```
which would produce results such as:
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## Create a pie chart
1. Create or open a Dashboard and click on **Add Panel > Categorical**.
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1. Provide a Log or Metric query and press **Enter** for it to run.
1. Once the query runs you will need to flip the chart type to **Pie**.
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1. [Modify the chart](./modify-chart.md) as desired.
1. Click the **Add to Dashboard** button on the top right of the window to add the panel to your dashboard.
})