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# Workflow helper objects for retrieving data

> This reference lists the Workflow helper objects you can use to query related data within a workflow.

This reference lists the Workflow helper objects you can use to query related data within a workflow.

Workflow provides the following helper objects for you to query the related data within a workflow:

* [WorkflowInstance](/docs/platform/extensibility/workflow/create-and-manage-workflow-definitions/workflow-reference/leverage-workflow-helper-objects-to-retrieve-related-data/workflowinstance): Data of the current workflow run
* [WorkflowSetup](/docs/platform/extensibility/workflow/create-and-manage-workflow-definitions/workflow-reference/leverage-workflow-helper-objects-to-retrieve-related-data/workflowsetup): Setup data of the workflow version
* [TaskInstance](/docs/platform/extensibility/workflow/create-and-manage-workflow-definitions/workflow-reference/leverage-workflow-helper-objects-to-retrieve-related-data/taskinstance): Data of the workflow task instance
* [Credentials.zuora](/docs/platform/extensibility/workflow/create-and-manage-workflow-definitions/workflow-reference/leverage-workflow-helper-objects-to-retrieve-related-data/credentials-zuora): Information about the user who issued the workflow run

You can use Liquid to query against the above objects.

For example, the following query can be used in a [Retrieve: Data Query](/docs/platform/extensibility/workflow/create-and-manage-workflow-definitions/workflow-reference/workflow-task-reference/retrieve-data-query) task to retrieve the result of the current workflow run:

```
Select * from workflow_task where workflowid = {{ WorkflowInstance.id }}
```

This query leverages `{{ WorkflowInstance.id }}` to retrieve the current Workflow run ID.