title: COUNT help in MySQL
body: <p>I have the following table: Table is: probe</p>
  
  <p>probe</p>
  
  <p>------ProbeID------TranscriptID----</p>
  
  <pre><code>   2655       4555555
     2600       5454542
     2600       4543234
     2344       56595959
  </code></pre>
  
  <p>...etc</p>
  
  <p>How do I count the probes per each transcript? Importantly, same probe can associate with more than one transcript. </p>
  
  <p>I need the final output to be the actual number of probes. By that I mean, the Total number (i.e. 12340) and not the actual table with the probes. </p>
  
  <p>Thank you! </p>