Equivalent of Oracle's RowID in SQL Server

Question

What\'s the equivalent of Oracle\'s RowID in SQL Server?

Answer 1

Please see http://msdn.microsoft.com/en-us/library/aa260631(v=SQL.80).aspx In SQL server a timestamp is not the same as a DateTime column. This is used to uniquely identify a row in a database, not just a table but the entire database. This can be used for optimistic concurrency. for example UPDATE [Job] SET [Name]=@Name, [XCustomData]=@XCustomData WHERE ([ModifiedTimeStamp]=@Original_ModifiedTimeStamp AND [GUID]=@Original_GUID

the ModifiedTimeStamp ensures that you are updating the original data and will fail if another update has occurred to the row.