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pfep
batch APEX
1) trigger: Summarize organizational donations on account | Description: Donations made by individuals are summarized on the contact record; development wishes to extend the feature to organizations | Behavior of trigger: what it shuld do: NOTE: Should be implemented as batch APEX that runs nightly rather than a trigger due to security roles | Main object: Account | Related objects:Opportunity(recordtype=organizational donation) |
From your requirement, it seems you need a Report and customize or a schedule report instead of a Trigger.