title: Rerurn null if subquery hasn't value sql
body: <p>If this query hasn't B values, but has A values, can I have null where there are no values?</p>
  
  <pre><code>SELECT A, B
  FROM 
  (SELECT title as A
   FROM TABLE1 
   INNER JOIN TABLE2 ON TABLE1_TABLE2_ID = TABLE2_ID
   INNER JOIN TABLE3 ON TABLE1_TABLE3_ID = TABLE3_ID
   WHERE TABLE_TABLE3_ID = 2008 AND TABLE_TYP LIKE 'A'),
  
  (SELECT title as B
   FROM TABLE1 
   INNER JOIN TABLE2 ON TABLE1_TABLE2_ID = TABLE2_ID
   INNER JOIN TABLE3 ON TABLE1_TABLE3_ID = TABLE3_ID
   WHERE TABLE_TABLE3_ID = 2008 AND TABLE_TYP LIKE 'B')
  </code></pre>
  
  <p>For example, this table must be show</p>
  
  <pre><code>  A        B
  ---------------
  Computer  null
  </code></pre>
  
  <p>But now it show the values only if Id has Type A and Type B</p>