title: CountIF cell value matches adjacent cell
body: <p>I have a table used to track document versions and whether or not a user has read the most up to date version.
  I want to track the number of up to date documents read per user and I'm really struggling with CountIF.</p>
  <p><a href="https://i.stack.imgur.com/6jnje.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/6jnje.png" alt="enter image description here" /></a></p>
  <p>How do I count the number of times UserA matches Doc version?</p>
  <p>What I have tried is =COUNTIF(A1:A12, &quot;=&quot;&amp;B1:B12) which gives multiple rows of results I don't really understand. I have also tried =COUNTIF(A1:A12, &quot;=&quot;&amp;B1) but of course that just matched to B1.</p>
  <p>Thanks</p>