Sql updating a row

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When you sign in to comment, IBM will provide your email, first name and last name to DISQUS.That information, along with your comments, will be governed by DISQUS’ privacy policy.To prevent premature constraint violations you can temporarily suspend update constraints.This serves two purposes: In Windows Forms, the data binding architecture that's built into the datagrid suspends constraint checking until focus moves out of a row, and you do not have to explicitly call the Begin Edit, End Edit, or Cancel Edit methods.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.For more information, see Validate data in datasets.Information about the changes in a dataset is maintained in two ways: by flagging rows that indicate that they have changed (Row State), and by keeping multiple copies of a record (Data Row Version).

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.

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