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Amruta ChaudharyAmruta Chaudhary 

How to copy field data from child object to parent object ?

CharuDuttCharuDutt
Hii Amruta
Try Below Trigger 
trigger Contacttrigger on Contact (After Insert) {
    Set<Id> setAccIds = new Set<Id>();
    if(Trigger.isInsert){
         if(trigger.isAfter){
        for(Contact con : Trigger.new){
            if(con.AccountId != null){
            setAccIds.add(con.AccountId);
            	}
			}
		}
    } 
   
    for(Account acc :[Select id,Description ,(Select id,name from contacts) from Account where Id in : setAccIds]){
      String s ='';
        for(Contact Con :acc.contacts){
            s+=Con.Name +',';  
        }
        acc.Description =  s.removeEnd(',');
        acclist.add(acc);
    }
    if(acclist.size()>0){
        update accList;     
    }
}
Please Mark It As Best Answer If It Helps
Thank You! 
Amruta ChaudharyAmruta Chaudhary
i want copy data from quote(child) object to Opportunity (parent) object 

Quote       Opportunity

number     number 
version    version 
primary field on quote must be checked .
 
Suraj Tripathi 47Suraj Tripathi 47
Hi Amruta,

please try this approach  
list<quote__c> quoteList = [select id,opportunityId,number__c,version__c from quote__c where opportunityId !=              null];
 set<id> oppIdSet = new set<id>();

for(quote__c quoteObj :quoteList ){
    oppIdSet.add(quoteObj.opportunityId );  
      }

map<id,opportunity> oppmap = new map<id,Opportunity>( [select 
 id , number__c , version__c from Opportunity where id In: oppIdset]);

for(quote__c quoteObj :quoteList ){
    if(oppmap.containsKey(quoteObj.opportunityId){

      opportunity oppObj = oppmap.get(quoteObj.opportunityId);
      oppObj.number__c  = quoteObj.number__c  ;
      oppObj.version__c  = quoteObj.version__c  ;

      oppmap.put(quoteObj.opportunityId,oppObj );
  }  
}
update oppmap.values();

 If you find your Solution then mark this as the best answer.

Thank you!
Regards,
Suraj Tripathi