Saves all changes (updates, inserts, deletes) made on a data set in a single transaction. The concurrency model is optimistic which means, the transaction succeeds if the data to save was not altered in the datastore in the meantime.

Saves all changes (updates, inserts, deletes) made on a data set in a single transaction. The concurrency model can be: - AllColumns: optimistic concurrency is checked on every columns - ChangedColumns: optimistic concurrency is checked on every columns that have altered data - NoColumns: optimistic concurrency is not checked