On Account object I have Custom field: Support_end_date

I have a custom object called: license. On license I have a custom field called: license_end_date. Each license has a parent object: Account (in a lookup relation NOT Master-detail so rollup summary is not an option)

it can happen that an account has several licenses. And here is where my problem starts: - Account can have support_end_date of X - every license has its' own end_date

I need to Update the database that Account will have the latest end_date from it's licenses (e.g. account suport_end_date will be the same has the license with the latest date)

  • It seems that rollup summary fields are only available with Master-Detail relationships. An idea request has been submitted on this, but no update yet.

  • apparently I need that same functionality.



Two possibilities:

  1. Change the Account to be a Master-Detail field on the License and then create the Account's support_end_date field as a roll-up summary field that is set to the maximum license_end_date of the child Licenses. It is important that you change the field to Master Detail because the roll-up summary won't be available for what you are trying to do on a Lookup.
  2. Create a trigger on the License Object that simply updates the Account's support_end_date when the License record's license_end_date is greater than the Account's support_end_date. This would be a bit trickier too, when you start to think about having to handle deletes as well.

Clearly #1 is easier and if it doesn't make sense for a License to exist on its own without a parent Account then you probably want to make it a Master-Detail anyway.

If you cannot use #1 and need to update the current data you can either do it manually or through code. Perhaps you could create a report to assist or data export to CSVs and manipulate with Excel to get a data load of Account objects.

For code, you could write something like the following or if you have a lot of records look into using Batch Apex with your solution.

for (AggregateResult[] licenses: [    
    Select Max(License_End_Date__c)  maxDate, Account__c acctId
    From License__c
    Group by Account__c]) {

    List<Account> accts = new List<Account>();
    for (AggregateResult ar : licesnses) {
          Id acctId = (Id) ar.get('acctId');
          if (acctId != null) {
              Date maxDate = (Date) ar.get('maxDate');
              Account a = new Account(
                  Id = acctId,
                  Support_End_Date__c = maxDate

    System.debug('about to update accounts with max dates, Accounts=' + accts);
    update accts;
    System.debug('successfully updated accounts with max dates, Accounts=' + accts);
| improve this answer | |
  • Thanks, #1 can not happen, as licenses can exist on their own. #2 is fine, but I need a solution for the current data as well. – Saariko Aug 19 '12 at 6:39

You can do this with a roll-up summary field on account that grabs the maximum support_end_date of the licenses.

| improve this answer | |
  • The original question says that is not available due to the relationship not being Master-Detail; please provide instructions for a regular lookup if you know of a workaround. – Mike Chale Aug 19 '12 at 12:36
  • I just didn't read the question carefully enough. Peter Knolle's answer is the correct one. – Greg Grinberg Aug 19 '12 at 13:48

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