title: Compare two Unique set of records and pull the ID of the Missing Record
body: <p>On Account I have two objects Monthly and Yearly which are on Master-Detail relationship with Account.</p>
  
  <p>Monthly has records captured for each month. For example USA, GBR, IND ETC</p>
  
  <p>Yearly has Once in a Year records captured USA, GBR, IND ETC</p>
  
  <p>We have identified that Yearly records are which we are pulling out of our DB are mismatching and some additional countries are being added, for example </p>
  
  <p>Monthly has - USA, GBR, IND
  Yearly should have - USA, GBR, IND 
  But we are having - USA, GBR, IND and AUS which is wrong.</p>
  
  <p>We would want to find out the record which has AUS and then delete or resend the information.</p>
  
  <p>Unique fields in Monthly and Yearly are</p>
  
  <p>distributor__c = Master detail relation ship with Account</p>
  
  <p>AC_Sponsor_Key__c = Country+distributor ID which is Unique in both objects</p>
  
  <p>Please help me with a solution on how to tackle this situation</p>