Newly added column in sales order table not showing in grid

I had added a new column in sales_order table using UpgradeSchema. The column was successfully added and also I was able to save value in it.

Now what I want is to show this column in Sales Order Grid. I tried to show it with below code but its not working.

<listing xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:module:Magento_Ui:etc/ui_configuration.xsd">
<columns name="sales_order_columns">
    <column name="ramp_order_id">
        <argument name="data" xsi:type="array">
            <item name="config" xsi:type="array">
                <item name="filter" xsi:type="string">text</item>
                <item name="sortable" xsi:type="boolean">false</item>
                <item name="label" xsi:type="string" translate="true">Ramp Order Id</item>
            </item>
        </argument>
    </column>
</columns>

Please help me to solve this problem. Thank you