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* Docs: Remove 'Reference' prefix from all reference topic filenames: Per issue #46818, prefixing reference topics with "Reference" can damage usability. Remove the prefix from filenames. * Docs: Remove "Reference:" prefix from titles and ToC headings: Per issue #46818, prefixing reference topics with "Reference" can damage usability. Remove the prefix from titles and ToC headings. H1s retain the prefix to emphasize the nature of the doc without affecting the docs' discoverability. * Docs: Move Transformation functions reference alongside Transformation docs * Docs: Update links to reference docs in Transformation docs * Docs: Update links to reference docs in Panels docs * Docs: Update links to query options reference across docs * Docs: Update links to standard field definitions reference across docs * Docs: Update links to calculation types reference across docs * Docs: Update links to transformation functions reference across docs * Docs: Rename apply transformation doc filename to add transformation * Docs: Rename apply transformation doc to add transformation * Docs: Update links to add transformation doc across docs * Docs: Update relrefs in Transformation functions reference
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30 lines
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title = "Add a query"
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weight = 30
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aliases = ["/docs/sources/panels/query-a-data-source/add-a-query/"]
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# Add a query
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A query returns data that Grafana visualizes in dashboards. When you create a panel, Grafana automatically selects the default data source.
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## Before you begin
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- [Add a data source](../../../datasources/add-a-data-source).
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- Ensure that you know the query language of the data source.
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- [Add a panel]({{< relref "../working-with-panels/add-panel.md" >}}).
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**To add a query**:
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1. Edit the panel to which you are adding a query.
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1. Click the **Query** tab.
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1. Click the **Data source** drop-down menu and select a data source.
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1. Click **Query options** to configure the maximum number of data points returned by the query and how frequently you want the query to request data from the data source.
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For more information about query options, refer to [Query options]({{< relref "../query-options.md" >}}).
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1. Write the query.
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1. Click **Apply**.
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The system queries the data source and presents the data in the visualization.
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