title: Get all tags of specific post in single record of mysql with XML PATH
body: <p>I have news table like this</p>
  
  <pre><code>news 
  ````````````
  id          |   title     
  ------------+------------- 
  1           |   test1
  2           |   test2
  </code></pre>
  
  <p>and </p>
  
  <pre><code>tags
  ````````````
  id          |   name     
  ------------+------------- 
  1           |   tag1
  2           |   tag2
  </code></pre>
  
  <p>and</p>
  
  <pre><code>news_tag
  ````````````
  news_id     |   tag_id     
  ------------+------------- 
  1           |   1
  1           |   2
  2           |   1
  </code></pre>
  
  <p>Now I want to get this</p>
  
  <pre><code>newsid     |   title      |   tag_name 
  ------------+-------------------------- 
  1           |   test1     |    tag1,tag2
  2           |   test2     |   tag1
  </code></pre>