Developing Apama Applications > Developing Apama Applications in EPL > Working with Streams and Stream Queries > Working with lots that contain multiple items > Behavior of stream queries with lots > Grouped projections and lots
Grouped projections and lots
Suppose that a query that contains a group by clause processes a lot that contains several items. The query generates new projected items for the groups where the state of the group after the lot is input differs from the state of the group before the lot is input.
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