title: mysql subquery with more than one columns
body: <p>I'm trying to do this</p>
  
  <pre><code>SELECT 
      `projects`.*,
      (SELECT 
          COUNT(`leads`.`id`),
          `pixel`.`uuid`,
          `pixel`.`project_id`
       FROM `leads` 
       LEFT JOIN `pixel` ON `leads`.`pixel` = `pixel`.`uuid`
       WHERE `projects`.`id` = `pixel`.`project_id`
       ) as leads
  
  FROM `projects`
  </code></pre>
  
  <p>But I can't since my subquery select has more than one column, but I must have it so I can make the join, anyway around this? (all I need is the count)
  thank you.</p>