title: How to use GROUP_CONCAT function on MSSQL
body: <p>How can I use the GROUP_CONCAT function on MSSQL while MySQL is running?</p>
  
  <pre>
  current table;
       QUESTION_ID    ANSWER_ID   USER
  1.        1             1       A
  2.        1             1       B
  3.        1             2       C
  
  i need;
  
       QUESTION_ID    ANSWER_ID   USER
  1.        1             1       A, B
  2.        1             2       C
  </pre>
  
  <p>thanks in advance..</p>