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Change Data Capture 101: A Quick Reference Guide

Change data capture is crucial to ensuring that information in databases is accurate and up-to-date. Some experts consider it the best data replication method available. 

Looking to learn more about change data capture? Read on to learn what it is, how it came into existence, and how it helps businesses. 

What Is Change Data Capture? 

Change data capture (CDC) is the process of capturing changes made at a data source and then applying them throughout the enterprise. You only copy the changed records from the source to the target, so there’s less of a need for bulk uploading of a data warehouse or a data mart. 

The concept of CDC was introduced in SQL Server 2008. It was meant to capture information that was inserted, updated, or deleted for a specific table. CDC expands upon logic that has long been in use in transaction replication, sp_replcmds

The sp_replcmds command returns the commands for transactions marked for replication. It’s a stored publisher that’s executed on the publication database. 

How Does Change Data Capture Help Businesses?

There are a few benefits for businesses. 

To start, you can capture and record all change events quickly – you won’t slow down production environments or long-running queries. Moreover, you don’t need to deal with the entire database. That capability makes CDC significantly faster and more accurate than other data replication methods. 

Additionally, it allows you to identify records that have been deleted since the last time the data was polled. With CDC, you can tell which information has been removed so that all of your data is identical (and exact). You can also capture old record state and other metadata, which is useful for auditing purposes. 

Person writing the word Data.

CDC plays a crucial role in data integration, too. Data integration is in and of itself vital to businesses because it brings stores of information together so that you can draw new conclusions from them and make better decisions. 

How do CDC and data integration fit together? It allows everyone in the organization to access the same information. They have a unified view of corporate information, and in addition, all incomplete or non-quality data is removed. With CDC, you avoid bottlenecks to which other data replication methods are prone. 

Connect CDC Real-time Data Replication

When everyone has access to the same information, that saves the IT department time and energy – staffers no longer have to run queries on data so that line-of-business teams can get the answers to their questions. Analyzing information is now faster and simpler than ever before. 

CDC represents an important development in business technology, as it is not only a fast and accurate data replication method, but it plays a crucial role in data integration. To learn more about CDC, watch our webcast, where we introduce you to Connect CDC’s capabilities and discuss how you can use Connect CDC in a variety of use cases that help drive your business forward.

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