Is is possible to concatenate the values of a field during the merging of records ? For example : BuyerConnection field on Record A1 = 'ca/phnx/nv' Record A2 = 'mo/oh/ny'

when these 2 records are merged I have to get the resultant field value on the winning record as 'ca/phnx/nv/mo/oh/ny'

any ideas are greatly appreciated

  • What are you using to merge these records? It's possible if you're building your own apex merge engine. – Boris Bachovski Jun 9 '14 at 23:57
  • Hi @Bachovski.. I am using the standard merge stmt and donno how to customize it to implement this – user8332 Jun 10 '14 at 0:10

You can perform custom logic while merging using an after-delete trigger. Because the records are locked during the merge, you should use an asynchronous call (@future) to update the records afterwards. You can query the deleted records with the ALL ROWS keyword of SOQL.

Here's a demonstration:


trigger mergeAccount on Account (after delete) {


public class AccountMerge {
    public static void customMerge(Set<Id> accounts) {
        Map<Id, Account> oldAccounts = new Map<Id, Account>([SELECT Id, Name, Description, MasterRecordId FROM Account WHERE Id IN :accounts ALL ROWS]);
        Map<Id, Account> newAccounts = new Map<Id, Account>();
        for(Account record:oldAccounts.values()) {
            newAccounts.put(record.MasterRecordId, null);
        if(newAccounts.isEmpty()) {
        newAccounts.putAll([SELECT Id, Description FROM Account WHERE Id IN :newAccounts.keySet() FOR UPDATE]);
        for(Id oldId: accounts) {
            Account oldAccount = oldAccounts.get(oldId), newAccount = newAccounts.get(oldAccount.MasterRecordId);
            if(String.isBlank(oldAccount.Description)) {
            if(String.isBlank(newAccount.Description)) {
                newAccount.Description = '';
            newAccount.Description += '\n\nMerged from '+oldAccount.Name+':\n\n'+oldAccount.Description;
        update newAccounts.values();
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I don't think there is standard functionality that will allow you to do that. I would suggest creating a custom Merge button and some VisualForce/Apex code to replicate the standard merge functionality with additional customised logic that will concatenate the values upon merging.

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  • 2
    A trigger could merge fields based on custom logic; you can tell which record was merged into another by using the MasterRecordId field in the after-delete trigger. – sfdcfox Jun 10 '14 at 0:26
  • 1
    @sfdcfox that is pretty sweet, seems like that'd be worthy of a separate answer on this question – Ralph Callaway Jun 10 '14 at 4:38
  • I agree, didn't think of that :) – Boris Bachovski Jun 10 '14 at 4:41
  • You all convinced me. Enjoy! – sfdcfox Jun 10 '14 at 7:21

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