# Change data capture with Amazon DynamoDB
Many applications benefit from capturing changes to items stored in a DynamoDB table, at the point in time when such changes occur. The following are some example use cases:
+ A popular mobile app modifies data in a DynamoDB table, at the rate of thousands of updates per second. Another application captures and stores data about these updates, providing near-real-time usage metrics for the mobile app.
+ A financial application modifies stock market data in a DynamoDB table. Different applications running in parallel track these changes in real time, compute value-at-risk, and automatically rebalance portfolios based on stock price movements.
+ Sensors in transportation vehicles and industrial equipment send data to a DynamoDB table. Different applications monitor performance and send messaging alerts when a problem is detected, predict any potential defects by applying machine learning algorithms, and compress and archive data to Amazon Simple Storage Service (Amazon S3).
+ An application automatically sends notifications to the mobile devices of all friends in a group as soon as one friend uploads a new picture.
+ A new customer adds data to a DynamoDB table. This event invokes another application that sends a welcome email to the new customer.
DynamoDB supports streaming of item-level change data capture records in near-real time. You can build applications that consume these streams and take action based on the contents.
**Note**
Adding tags to DynamoDB Streams and using [attribute-based access control (ABAC)](access-control-resource-based.md) with DynamoDB Streams aren't supported.
The following video will give you an introductory look at the change data capture concept.
[](http://www.youtube.com/watch?v=https://www.youtube.com/embed/VVv_-mZ5Ge8)
**Topics**
+ [Streaming options for change data capture](#streamsmain.choose)
+ [Using Kinesis Data Streams to capture changes to DynamoDB](kds.md)
+ [Change data capture for DynamoDB Streams](Streams.md)
## Streaming options for change data capture
DynamoDB offers two streaming models for change data capture: Kinesis Data Streams for DynamoDB and DynamoDB Streams.
To help you choose the right solution for your application, the following table summarizes the features of each streaming model.
[\[See the AWS documentation website for more details\]](http://docs.amazonaws.cn/en_us/amazondynamodb/latest/developerguide/streamsmain.html)
You can enable both streaming models on the same DynamoDB table.
The following video talks more about the differences between the two options.
[](http://www.youtube.com/watch?v=https://www.youtube.com/embed/UgG17Wh2y0g)