title: Sql Query help to get non matching records from two tables
body: <p>I am trying to get non matching records from 2 tables</p>
  <p>For ex</p>
  <pre><code>TableA
   ID           Account
   1               Acc1
   2               Acc2
   3               Acc3
  
   TableB
   Opp          Accountid
   Opp1            1
   Opp2            2
   Opp3            4
  </code></pre>
  <p>I need to know which accountid is present in TableB but not in TableA. It would be wonderful if someone could provide this query.</p>
  <p>Required record would be Opp3 of tableB</p>
  <p>Thanks</p>
  <p>Prady</p>