Declarative Lookup Rollup Summaries (DLRS)
By Andrew Fawcett / SFDO Community
What It Does
Roll up child records to parent objects without code — even across lookup relationships where native rollup summary fields don't work.
Glen's Take
Before Flow could do rollups, DLRS was the answer. Still useful for complex scenarios with cross-object rollups that Flow handles awkwardly. The scheduling and real-time modes are solid. Just watch your governor limits on high-volume objects.
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