How to add a backend grid column which does not have a corresponding database column?

Ask your questions
1

how render a grid custom column?
how I have to define the item to set the render?

 <column name="title">
        <argument name="data" xsi:type="array">
            <item name="config" xsi:type="array">
                <item name="filter" xsi:type="string">text</item>
                <item name="label" xsi:type="string" translate="true">Title</item>
                <item name="sortOrder" xsi:type="string">10</item>
            </item>
        </argument>
 </column>
2

See the grid-column-tagged articles.

3

The idea is set a renderer to that column (not exist this column in database) is just to make a calculi, for example that column is to show a result of calculate other values in columns (A+B).

4

For example, the «Action» backend grid column does not have a corresponding database column.