title: Merging two rows into one row with MYSQL
body: <pre><code>ID        Column1        Column2        Column3
  1         data1                         data3
  1                        data2
  </code></pre>
  
  <p>from table above, may I perform a single query to get this? :</p>
  
  <pre><code>ID        Column1        Column2        Column3
  1         data1          data2          data3
  </code></pre>