title: How to give an alias name with a space in sparksql
body: <p>i have tried below codes</p>
  
  <p>trial-1</p>
  
  <p>..........</p>
  
  <pre><code>val df2=sqlContext.sql("select concat(' ',Id,LabelName) as 'first last'  from  p1 order by LabelName desc ");
  </code></pre>
  
  <p>trial-2</p>
  
  <p>.........</p>
  
  <pre><code>val df2=sqlContext.sql("select concat(' ',Id,LabelName)   from  p1 order by LabelName desc ");
  
  val df3=df2.toDF("first last")
  </code></pre>
  
  <p>trial-1 is throwing error when i tried to run it.......but in trial-2 it is taking the command but throwing the error when i performed below action</p>
  
  <pre><code>scala&gt; df3.write.parquet("/prashanth/a1")
  </code></pre>