Show custom query data in Magento 2 admin grid - grid

Question

I have created a custom module which stores some data related to the product in a custom collection.
Now to show it as a report in the Magento 2 admin, I need to create a custom query to join it with the customer and product tables and do some aggregate functionality such as count grouped by the product.
Is there a way we can do that using custom SQL query and pass the whole result in the grid and it takes the relevant column names and shows it in the grid?
<?xml version="1.0"?>
<listing xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:noNamespaceSchemaLocation="urn:magento:module:Magento_Ui:etc/ui_configuration.xsd">
<argument name="data" xsi:type="array">
<item name="js_config" xsi:type="array">
<item name="provider" xsi:type="string">bargain_offer_listing.bargain_offer_listing_data_source</item>
<item name="deps" xsi:type="string">bargain_offer_listing.bargain_offer_listing_data_source</item>
<item name="spinner" xsi:type="string">bargain_offer_listing_columns</item>
</item>
</argument>
<listingToolbar name="listing_top">
<bookmark name="bookmarks"/>
<columnsControls name="columns_controls"/>
<filterSearch name="fulltext"/>
<filters name="listing_filters"/>
<paging name="listing_paging"/>
</listingToolbar>
<dataSource name="bargain_offer_listing_data_source">
<argument name="dataProvider" xsi:type="configurableObject">
<argument name="class" xsi:type="string">MyModule\Bargain\Ui\DataProvider\OfferListingProvider
</argument>
<argument name="name" xsi:type="string">bargain_offer_listing_data_source</argument>
<argument name="primaryFieldName" xsi:type="string">entity_id</argument>
<argument name="requestFieldName" xsi:type="string">entity_id</argument>
<argument name="data" xsi:type="array">
<item name="update_url" xsi:type="url" path="mui/index/render"/>
<item name="storageConfig" xsi:type="array">
<item name="indexField" xsi:type="string">entity_id</item>
</item>
</argument>
</argument>
</dataSource>
<columns name="bargain_offer_listing_columns">
<column name="entity_id">
<settings>
<filter>textRange</filter>
<label translate="true">ID</label>
</settings>
</column>
<column name="product_sku">
<settings>
<filter>text</filter>
<label translate="true">Product Sku</label>
</settings>
</column>
<column name="product_name">
<settings>
<filter>text</filter>
<bodyTmpl>ui/grid/cells/text</bodyTmpl>
<label translate="true">Product Name</label>
</settings>
</column>
<column name="number_of_buyers">
<settings>
<filter>text</filter>
<label translate="true">No of buyers</label>
</settings>
</column>
<column name="times_bought">
<settings>
<filter>text</filter>
<label translate="true">Times Bought</label>
</settings>
</column>
</columns>
</listing>
This is my data provider class
use Magento\Framework\View\Element\UiComponent\DataProvider\DataProvider;
class OfferListingProvider extends DataProvider
{
}
But I do not know how to utilize this. Any suggestions or guides is appreciated.