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Four Methods of Change Data Capture
As its name suggests, Change Data Capture (CDC) techniques are used to identify changes. CDC can be the basis to synchronize another system with the same incremental changes, or to store an audit trail of changes. The audit trail may subsequently be used for other uses e.g. to update a data warehouse or to run analyses across the changes e.g. to identify patterns of changes. In this blog post, I will describe the four common methods to perform CDC: Date_Modified, DIFF, Triggers, and Log-Based Change Data Capture. I will also share some of the challenges with each method.
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