title: How to replace a complex SQL MINUS query with LEFT OUTER JOIN equivalent
body: <p>Trying to figure how how to replace the following, with equivalent left outer join:</p>
  
  <pre><code>select distinct(a.some_value)
  from table_a a, table_b b
  where a.id = b.a_id 
  and b.some_id = 123
  and b.create_date &lt; '2014-01-01' 
  and b.create_date &gt;= '2013-12-01'  
  MINUS
  select distinct(a.some_value)
  from table_a a, table_b b
  where a.id = b.a_id 
  and b.some_id = 123 
  and b.create_date &lt; '2013-12-01' 
  </code></pre>
  
  <p>Can not do "NOT IN", as the second query has too much data.</p>