title: Aggregate dimension values by month and year
body: <p>I've been tracking a bunch of dates (with format string) under the dimension 'Product' in Google Analytics.</p>
  <p>In Data Studio, I then have a simple Line Chart with all these dates (x) and their respective List Views. Like this:</p>
  <p><a href="https://i.stack.imgur.com/LB4bW.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/LB4bW.jpg" alt="enter image description here" /></a></p>
  <p>Is there a way to aggregate these days by month and year?</p>
  <p>Like this:</p>
  <p>2020-08<br>
  2020-09<br>
  2020-10<br>
  and so on...</p>
  <p>Thanks in advance for your help.</p>