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adi salesforceadi salesforce 

Trigger to update account related contacts

Account 'Abc' has 3 contacts. In two contact records phone number is empty  but in third contact phone number is not empty. The third contact phone number should be updated in other two records phone numbers.
Raj VakatiRaj Vakati
Try this
  
trigger UpdateContactPhone on Contact (before insert) {
    Map<Id,String> accIds = new Map<Id,String>();
    for(Contact con : Trigger.new) {  
        If(con.Phone!=null){
            accIds.put(con.AccountId , con.Phone) ; 
        }
        
    }
    
    List<Contact> cons = [Select Id ,Phone,AccountId from Contact where AccountId IN :accIds.keySet() AND Phone=NULL ];
    for(Contact c :cons){
        c.Phone = accIds.get(c.AccountId); 
    }
    
    update cons ;
    
}