What are the advatages of aggrigate storage database

please explain clearly

ASO is excellent for large read-only analysis with minimal complex calculations.
Its main function is aggregation. By default it does not store aggregations; rather it calculates them dynamically when you retrieve. You can create aggregations if you need even more performance.
Secondly it has compression technology that saves a lot of disk space. It most cases data that is loaded, by default, is smaller then the actual source data.
Example Applications
Sales Analysis
POS Analysis
Executive Reporting
Brian Chow

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