title: Update fields in DB table by condition without loading
body: <p>Is it possible to perform simple SQL UPDATE operator with EF Core and LINQ?
  I want to use LINQ because of type and refactoring safety. And I need to avoid loading bulk of objects back and forth between an app and databse driver
  Basically I need smth like this:</p>
  
  <pre><code>DB.Items.Update(i =&gt; i.Value = 5).Where(i =&gt; i.Flag &gt; 5);
  </code></pre>