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I would like to use @SUM function in Aggregate Expressions
Total, average, etc. can aggregate several items at once in the summary field. However. Other aggregations must be added one by one at the Derive node. This is very inefficient. Also, if you use the sum field, you can not decide the field name of the summation result freely. It is necessary to insert a filter node in the subsequent process and change the field name. This is also inefficient.
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