# What is Talend Change Data Capture?

Talend Change Data Capture is a complete Data Event Processing solution. It captures the transactions (or events) of a database (mainly insert, update, delete) in real time, in order to work on them and send them to targets.

Talend Change Data Capture provides a comprehensive solution for online backup, distribution to eBusiness Internet/Intranet servers, decision support system data loading (real-time ETL), datawarehouse and big data incremental or real-time loading, inter-application exchange (EAI, ESB) requirements.

![](https://help.qlik.com/talend/en-US/change-data-capture-user-guide/Resources/images/tcdc-data-event-processing-solution.png)

The product offers the possibility to capture, select, transform and apply data from many databases to many other databases and services:

![](https://help.qlik.com/talend/en-US/change-data-capture-user-guide/Resources/images/tcdc-system.png)

Three different technologies are supported as targets:

* Relational database (traditional, hybrid, in-memory databases...).
* Streaming such as Kafka, Amazon Kinesis, Azure EventHub.
* Big data / data lakes such as Snowflake.

Here is an exhaustive list of supported sources and targets:

![](https://help.qlik.com/talend/en-US/change-data-capture-user-guide/Resources/images/tcdc-sources-targets-diagram.png)

With its transformation language and its capabilities to call external programs, the transformation module of Talend Change Data Capture paves the way for unlimited data selection and enhancement.

### In this section

* [How does Talend Change Data Capture work?](https://help.qlik.com/talend/en-US/change-data-capture-user-guide/7.3/how-does-tcdc-work-r)
* [Definition of parameters: selection and transformation](https://help.qlik.com/talend/en-US/change-data-capture-user-guide/7.3/definition-parameters)
* [Supervision and traceability](https://help.qlik.com/talend/en-US/change-data-capture-user-guide/7.3/supervision-traceability)
* [Automatic recoveries](https://help.qlik.com/talend/en-US/change-data-capture-user-guide/7.3/automatic-recoveries)
* [Glossary of terms](https://help.qlik.com/talend/en-US/change-data-capture-user-guide/7.3/tcdc-glossary)