title: Setting a database value to context variable in talend
body: <p>I have a job that flows like this.</p>
  
  <pre><code>  tAccessDatabse_1 ---&gt; tFileOutputXML_1. 
  </code></pre>
  
  <p>Now, my database has a schema, with usename and userid. My task to create/send data from the database to xml file, file name with username i.e, one file has to create for every user with his/her name.</p>
  
  <p>I tried like creating a conetxt varible but how can i set username to that context variable from the database ??</p>