As recommended by Microsoft, we will create a separate Filegroup and database file to host the Change Data Capture change tables:įirst we will create a new Filegroup using the ALTER DATABASE ADD FILEGROUP SQL statement:
CAN SQL SERVER CLIENT NAME BE CHANGED HOW TO
The CDC capture process reads these logs and copy it to the capture table and finally adding the associated changes information as the change metadata to the same table.īelow we will have a small demo showing how to configure the CDC on one of the SQLShackDemo database tables. Any DML change applied to the tracked table will be written to the transaction log. SQL Server Change Data Capture uses the SQL Server transaction log as the source of the changed data using asynchronous capture mechanism. When Change Data Capture is enabled on a user table, a new system table will be created with the same structure of that source table, with extra columns to include the changes metadata. This new feature is called SQL Server Change Data Capture, or CDC. The first available option in SQL server for tracking the changes are the After Insert, After Update and After Delete triggers, that requires coding effort from your side in order to handle these changes or added data, in addition to the performance impact of the triggers on the system.Īnother tracking and capturing solution introduced in SQL Server 2008 Enterprise, that tracks any Insert, Update or Delete operation applied to the user tables, with What, When and Where these changes applied, without any extra coding effort and keep it in system tables that can be easily accessed using normal queries. As a part of a Big Data project, we are often asked to find the best way to track the changes applied to the database tables, so that, no requirement is created to load all the huge tables to the data warehouse database at the end of the day, if not all of the data was changed.
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