Why we can not create an aggregate on an ODS Object? - ► Operational Data Store has very low data latency. Data moved to ODS mostly on event based rather than time based ETL to Data Warehouse/Data Mart. ► ODS is more closer to OLTP system. We don't normally prefer to store aggregated data in OLTP. So it is with ODS. ► Unlike data warehouse where data is HISTORICAL, ODS is near real time(NRT). So data aggregation is less important is ODS as data keeps changing. - Business Intelligence Interview Questions and Answers

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Question: Why we can not create an aggregate on an ODS Object?

Answer: ► Operational Data Store has very low data latency. Data moved to ODS mostly on event based rather than time based ETL to Data Warehouse/Data Mart. ► ODS is more closer to OLTP system. We don't normally prefer to store aggregated data in OLTP. So it is with ODS. ► Unlike data warehouse where data is HISTORICAL, ODS is near real time(NRT). So data aggregation is less important is ODS as data keeps changing.

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Question: Why we can not create an aggregate on an ODS Object?

Answer:

► Operational Data Store has very low data latency. Data moved to ODS mostly on event based rather than time based ETL to Data Warehouse/Data Mart. ► ODS is more closer to OLTP system. We don't normally prefer to store aggregated data in OLTP. So it is with ODS. ► Unlike data warehouse where data is HISTORICAL, ODS is near real time(NRT). So data aggregation is less important is ODS as data keeps changing. Source: CoolInterview.com

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