Question: Can DynamoDB do aggregations?
A simple answer is that DynamoDB does not support aggregations. Since DynamoDB is a NoSQL database and it has very limited query functionality. So it is impossible to perform aggregation from a DynamoDB table by directly calling the DynamoDB API.
But there are a few tools and techniques to achieve the aggregations:
- Perform a table scan and apply the logic on the application side to do the aggregation functions. But this is not a practical solution for the larger dataset.
- Use a materialized index on DynamoDB. The maximum number of entries could be stored in a separate table and updated as new records are added if your table is write-only and does not allow changes or deletions. This strategy isn't a universal fix, although it can work in some limited situations.
- Use Amazon Redshift to perform analytics.
- Utilize DynamoDB streams to perform data aggregation asynchronously and query an aggregated table to retrieve the aggregated data.
Other Common DynamoDB FAQ (with Answers)
- How do you enable cloudtrail for DynamoDB?
- Is DynamoDB good for analytics?
- Does DynamoDB have read replicas?
- Is DynamoDB good for unstructured data?
- What is DynamoDB used for?
- Can DynamoDB store relational data?
- Can you store XML in DynamoDB?
- Does Amazon DynamoDB store healthcare data?
- Can DynamoDB have null values?
- Is DynamoDB NoSQL?
- How to create an index in DynamoDB? (how to create an index in dynamodb)
- Why must table be empty to enable DynamoDB global tables?
- How to forcefully delete a DynamoDB table?
- Is DynamoDB open source?
- What is the maximum number of partitions in DynamoDB?