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title: Parameterization of dataset sources in DataLens On-premises
description: >-
  Parameterization of dataset sources in DataLens On-premises allows you to
  dynamically substitute parameters from a chart into an SQL query or a table or
  schema name.
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---

# Parameterization of dataset sources in DataLens On-premises

Parameterization of dataset sources allows you to dynamically substitute parameters from a chart into an SQL query or a table or schema name.

To enable source parameterization:

1. Configure **Raw SQL level** at the connection level. Activate the setting and select the **Subqueries and parameters** level.

1. Create a dataset and click **Enable parameterization** in its settings <!-- diplodoc:svg ![image](../_assets/console-icons/gear.svg) --><svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="none" viewBox="0 0 16 16"><path fill="currentColor" fill-rule="evenodd" d="M7.199 2H8.8a.2.2 0 0 1 .2.2c0 1.808 1.958 2.939 3.524 2.034a.2.2 0 0 1 .271.073l.802 1.388a.2.2 0 0 1-.073.272c-1.566.904-1.566 3.164 0 4.069a.2.2 0 0 1 .073.271l-.802 1.388a.2.2 0 0 1-.271.073C10.958 10.863 9 11.993 9 13.8a.2.2 0 0 1-.199.2H7.2a.2.2 0 0 1-.2-.2c0-1.808-1.958-2.938-3.524-2.034a.2.2 0 0 1-.272-.073l-.8-1.388a.2.2 0 0 1 .072-.271c1.566-.905 1.566-3.165 0-4.07a.2.2 0 0 1-.073-.27l.801-1.389a.2.2 0 0 1 .272-.072C5.042 5.138 7 4.007 7 2.199c0-.11.089-.199.199-.199M5.5 2.2c0-.94.76-1.7 1.699-1.7H8.8c.94 0 1.7.76 1.7 1.7a.85.85 0 0 0 1.274.735 1.7 1.7 0 0 1 2.32.622l.802 1.388c.469.813.19 1.851-.622 2.32a.85.85 0 0 0 0 1.472 1.7 1.7 0 0 1 .622 2.32l-.802 1.388a1.7 1.7 0 0 1-2.32.622.85.85 0 0 0-1.274.735c0 .939-.76 1.7-1.699 1.7H7.2a1.7 1.7 0 0 1-1.699-1.7.85.85 0 0 0-1.274-.735 1.7 1.7 0 0 1-2.32-.622l-.802-1.388a1.7 1.7 0 0 1 .622-2.32.85.85 0 0 0 0-1.471 1.7 1.7 0 0 1-.622-2.32l.801-1.389a1.7 1.7 0 0 1 2.32-.622A.85.85 0 0 0 5.5 2.2m4 5.8a1.5 1.5 0 1 1-3 0 1.5 1.5 0 0 1 3 0M11 8a3 3 0 1 1-6 0 3 3 0 0 1 6 0" clip-rule="evenodd"/></svg>.

   {% cut "Enabling parameterization in a dataset" %}

   ![image](../_assets/datalens/dataset-parametrization/dataset-parametrization-on.png)

   {% endcut %}

1. Follow the [steps](./create-dataset.md#add-parameters) to add the parameter and enable the **Allow use in source setting** option in its settings. Available value types: [Integer](./data-types.md#integer), [fractional number](./data-types.md#float), [string](./data-types.md#string), [date](./data-types.md#date), and [date and time](./data-types.md#datetime).
1. To define a dataset, use the **Insert parameter** button.


   
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