Updating access database from dataset in vb net dating derek jeter who
If the dataset contains constraints (such as foreign keys or non-nullable constraints), it's possible that the record can temporarily be in an error state as you update it.That is, it can be in an error state after you finish updating one column but before you get to the next one.However, you can also use different adapters, for example, to move data from one data source to another or to update multiple data sources.
The original version of a record is a copy of the record as it was the last time changes were committed in the dataset.
In practical terms, this is typically the version of a record as read from a data source.
When you merge datasets, new records in the source dataset are added to the target dataset.
Additionally, extra columns in the source dataset are added to the target dataset.
In this situation, the Enforce Constraints property is set to .