We know rollup component in Abinitio is used to summarize group of data record then why do we use aggregation?

We know rollup component in Abinitio is used to summarize group of data record then why do we use aggregation?

- Aggregation and Rollup, both are used to summarize the data.

- Rollup is much better and convenient to use.

- Rollup can perform some additional functionality, like input filtering and output filtering of records.

- Aggregate does not display the intermediate results in main memory, where as Rollup can.

- Analyzing a particular summarization is much simpler compared to Aggregations.