Add system properties (like _version, _createdAt) to existing Database

Hello,
I have a SQL-Database with 1200 entries. I created this database 2 years ago for an Windows phone 8 application. Now I started to develop a new Application and wanted to use this database in it. Now I wanted to use the Feature of OfflineSync.
The Problem seems the table Needs to have the columns _Version, _createdAt and _updatedAt,  but my table doesn't have it. Is there any possibility to add this?
Thank you and best regards
Thomas

Are you using the .NET backend?  If so, you can set up automapper to map to default values. The version field is optional, and for createdAt and updatedAt, you can hardcode a value. See this blog post for more details:
http://blogs.msdn.com/b/azuremobile/archive/2014/05/19/mapping-between-database-types-and-client-type-in-the-net-backend-using-automapper.aspx

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