Delete duplicate assets from Salesforce - duplicates

Question

I came to know that there are several duplicate assets in our Salesforce sandbox org. To do a cleaner testing of my current assignment, I need to cleanup the duplicate assets. Under each account, I could see that there are multiple active assets for the same product.
I ran the below query and it is fetching the duplicate counts.
SELECT AccountId, ProductCode, COUNT(Id)
FROM Asset
WHERE ProductCode != null AND RecordType.Name = 'Internal' and IsActive__c = true
GROUP BY AccountId, ProductCode
HAVING COUNT(Id) > 1
LIMIT 100
Is there a way to retain only the most recent active asset and delete the remaining ones?

Answer 1

Something like this? Untested but along these lines.
You might have to run it several times or add your own filter on Accounts to somehow slice data.
List<Asset> toDelete = new List<Asset>();
for(Account acc : [SELECT Id,
(SELECT ProductCode
FROM Assets
WHERE ProductCode != null AND RecordType.Name = 'Internal' and IsActive__c = true
ORDER BY LastModifiedDate DESC)
FROM Account
WHERE Id IN (SELECT AccountId FROM Asset WHERE ProductCode != null AND RecordType.Name = 'Internal' and IsActive__c = true)
LIMIT 1000]){
Set<String> productCodes = new Set<String>();
for(Asset a : acc.Assets){
if(productCodes.contains(a.ProductCode)){
toDelete.add(a);
} else {
productCodes.add(a.ProductCode);
}
}
}
delete toDelete;
Probably you can simplify it a bit, from what I remember set.add returns boolean saying whether collection has modified as result of the addition.