Hi,

I have 2 scenarios in custom object

1. If it's old user system should get update 

2. If it's a new user system get insert with list of users.

i have done with single record and getting confused for bulk records.

Can you please refer my coding and advise me how can i create for bulk records for update existing records.

If you are suggesting with MAP it's really appriciate.

Apex Controller

/*Upadte Existing Record*/
            set<id> ExUser = new set<id>();
            set<id> newUser = new set<id>();
            string newRole;
            string newAccess;
            List<GD_Quote_Team__c> ExMembers = [select ID,GD_User__c,GD_User__r.Name from GD_Quote_Team__c where GD_Quotes__c =: quoteId];
            
            for(GD_Quote_Team__c ex_mem : ExMembers){
               GD_Quote_Team__c qtm = new GD_Quote_Team__c();
                qtm.Id = ex_mem.Id;
                qtm.GD_User__c = ex_mem.GD_User__c;
                ExUser.add(qtm.GD_User__c);
               
            }
            
            for(GD_Quote_Team__c new_mem : qtTeamList){
                newUser.add(new_mem.GD_User__c);
                newRole = new_mem.GD_Team_Role__c;
                newAccess = new_mem.GD_Quote_Access__c;
                
            }
            List<GD_Quote_Team__c> updtMembers = new List<GD_Quote_Team__c>();
            if(ExUser == newUser){
                GD_Quote_Team__c ExMembers1 = [select ID,GD_User__c,GD_User__r.Name,GD_Team_Role__c,GD_Quote_Access__c from GD_Quote_Team__c where GD_Quotes__c =: quoteId and GD_User__c =: ExUser];
                GD_Quote_Team__c NwMembers1 = [select ID,GD_User__c,GD_User__r.Name,GD_Team_Role__c,GD_Quote_Access__c from GD_Quote_Team__c where GD_Quotes__c =: quoteId and GD_User__c =: newUser]; 
                GD_Quote_Team__c qtm1 = new GD_Quote_Team__c();
                qtm1.Id = ExMembers1.Id;
                qtm1.GD_User__c = NwMembers1.GD_User__c;
                qtm1.GD_Team_Role__c = newRole;
                qtm1.GD_Quote_Access__c = newAccess;
                updtMembers.add(qtm1);  
                update updtMembers;
            } else if(ExUser != newUser){
                if(qtTeamList.size()>0){upsert qtTeamList;}
            }

Thanks In Advance,
Soundar.