Data synchronization is the process of establishing consistency among data from a source to a target data storage and vice versa and the continuous harmonization of the data over time.

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Suppose, we have two tables in two different databases and the data in these tables needs to be fully synchronized. We can compare the data in these tables, update existing rows and add new rows. However, comparing all of the data in the tables is not an effective way and it would be better if we can detect changes in the source table and only apply these changes to the target. This problem can be solved by using the SQL Server rowversion data type.