Saves all changes (updates, inserts, deletes) made on a data set. The concurrency model is optimistic which means, we ensure that the datastore value was not altered in the meantime. All already altered data is returned as an error.

Saves all changes (updates, inserts, deletes) made on a data set. 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 All not saved data is returned as an error.