I am trying to update or insert forecastingquota records using the following code.  There are currently no rows in the object.  How do I process this when my initial selection returns no rows?

Currently I am only trying to insert 1 record per user which will be for January of the corrent year.  If I can get that working, then I can replicate for the other 11 months of the year.

Any suggestions will be greately appreciated.

trigger CreateQuota onStart_Budget__c (afterupdate) {

//Limit the size of list by using Sets which do not contain duplicate elements 

start_Budget__c sb = [select Update_Quota__c fromStart_Budget__climit 1];

system.debug('SB Update Quota = ' + sb.Update_Quota__c);

If (sb.Update_Quota__c ==true){

string YearOfToday = String.valueOf(Date.today().year());

string havequota ='YES';

 set<id>  Userids = newset<id>();  

for(Start_Budget__c sbp : trigger.new)

  { 

 list <User> p = [Select Id, Profile_Prefix__c, isactive from user where Profile_Prefix__c = 'Sale'and isactive = true];

 system.debug('P = ' + p);

 for (Integer i=0; i<p.size(); i++) {

if(p[i].Id != null) UserIds.add(p[i].Id); 

  }   

  }

//Map will contain one User Id to one sum value 

system.debug('Userids = ' + Userids);

system.debug('Userid size = ' + userids.size());

map<id,decimal> UserMap = newmap<id,decimal> ();

map<id,decimal> UserMap1 = newmap<id,decimal> ();

for(AggregateResult q : [select User__c,

sum(Jan_Amount__c) JAN,

sum(Feb_Amount__c)FEB,

sum(Mar_Amount__c)MAR,

sum(Apr_Amount__c)APR,

sum(May_Amount__c)MAY,

sum(June_Amount__c)JUNE,

sum(July_Amount__c)JULY,

sum(Aug_Amount__c)AUG,

sum(Sep_Amount__c)SEP,

sum(Oct_Amount__c)OCT,

sum(Nov_Amount__c)NOV,

sum(Dec_Amount__c)DEC

fromBudget__cwhere User__c IN :UserIds and text_year__c =: YearofToday groupbyrollup(User__c)])

{  

system.debug('Q = ' + q);

    UserMap.put((Id)q.get('User__c'),(decimal)q.get('JAN'));

  UserMap1.put((Id)q.get('User__C'),(decimal)q.get('FEB'));

}

system.debug('Have Quota Value = ' + havequota);

  List<ForecastingQuota> UsersToUpdate = new List<ForecastingQuota>();

for(ForecastingQuota o : [Select Id, QuotaOwnerId, StartDate,Quotaamount  fromForecastingQuotawhere QuotaOwnerId IN :UserIds])

  {  

system.debug('O initial = ' +o);

 if(o == null) havequota = 'NO';

 system.debug('Have Quota Value after selection = ' + havequota);

      Decimal PaymentSum = UserMap.get(o.Id);

         o.Quotaamount = 0;   

    system.debug('Quota Amount = ' + PaymentSum);  

         o.Quotaamount = PaymentSum;

     string QuotaDate ='01' + '01' + YearofToday;

        o.StartDate = date.valueOf(Quotadate);

     system.debug('qdate = ' + o.StartDate);   

     UsersToUpdate.add(o); 

  system.debug('Users to update = ' + UsersToUpdate);

  system.debug('Quota  = ' + o);   

  }

 update UsersToUpdate;

sb.Update_Quota__c =false;

system.debug('CreateQuota = ' + sb.Update_Quota__c);

update sb;

}

}