title: Merging two different queries
body: <p>Hello guys I have two diferrent queries :</p>
  
  <pre><code>SELECT ROUND(x, -1)    AS range,
  COUNT(*)    
  FROM  tbl_name
  GROUP  BY range;
  </code></pre>
  
  <p>and </p>
  
  <pre><code>SELECT ROUND(y, -1)    AS range,
      COUNT(*)    
      FROM   tbl_name
      GROUP  BY range;
  </code></pre>
  
  <p>both queries return two columns like this:
  0| 22</p>
  
  <p>I want to combine both of these queries which in returns 3 coloumns like this 
  0| 22 | 20</p>