Sql updating a row
After you complete an update, you can re-enable constraint checking, which also re-enables update events and raises them.
For example, you might inadvertently write data of the wrong type to a column, or data that's too long, or data that has some other integrity problem.
Or you might have application-specific validation checks that can raise custom errors during any stage of an update event.
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For the latest documentation on Visual Studio 2017, see Save data back to the database on docs. If you modify that data, it's a good practice to save those changes back to the database.The first step is to update the dataset with new records, changed records, or deleted records.