title: Hard Disk space reduce after executing big query
body: <p>After executing a big query (it is my mistake: I had only 1Gb of free hard disk space) SQL Server 2008 says there is no space for allocate some temporary tables...</p>
  
  <p>The the 1Gb reduced to 33Mb on my harddisk...</p>
  
  <ul>
  <li>Where did SQL saved or stored those Mb?</li>
  <li>How do I recover the 1Gb free space ?</li>
  </ul>