formula field date1-date2.if date1 or date2  is not enterd formula fied should display 0.00.please help me
 

What is the Bulk Api. what is the use in our salesforce

what is Record  id and Externa id..

In Trigger child to parent object is posiible to update master record.
in which time we use this scenario detail-master.
please help me...

trigger posJobAppUpdate2 on Position__c(before update, before insert) {     
  if(className.firstTimeFlag == true) {     List<Job_Application__c> jobAppList = new List<Job_Application__c>();  
  if(Trigger.isUpdate)        jobAppList = [SELECT Id, position__c, status__c, stage__c FROM      Job_Application__c WHERE position__c IN :trigger.newMap.keySet()];     for(Position__c posRec : Trigger.new) {     
if(trigger.isUpdate) {     
    Position__c  oldPosRec = system.trigger.oldMap.get(posRec.Id);   
      if(oldPosRec.status__c == 'Open' && posRec.status__c == 'Closed') {         
    if(jobAppList != NULL && !jobAppList.isEmpty()) {            
     for(Job_Application__c jobApp: jobAppList) {              
       if(jobApp.position__c == posRec.Id) {                         jobApp.Status__c = 'Closed';                         jobApp.stage__c = 'Closed – Position Closed';            
         }       
             }
      
      }      
   }    
   }
}   
   system.debug('jobAppRecList after for loop--->' + jobAppList);     update jobAppList;          className.firstTimeFlag= false;     }      }
 

How we can get if 6000 records-salry can adding.Total salry of all records.and batch size is 3000 how we can write in iterable
Please Help Me...

what is iterable and asyncapexjob

how to use salesforce in real time and wat is standard fields like accounts,leads....what is the purpose of those.

what is the differnce b/w workflow and triggers. and governor limits

giving the code for mobile format- 999-999-9999

How we can get if 6000 records-salry can adding.Total salry of all records.and batch size is 3000 how we can write in iterable
Please Help Me...