They only operate on one row at a time so to access the data returned by the database we must Move the cursor Next or Previous, First or Last.
You can make things a little more obvious by explicitly stating that the cursor is to be used for updating, as shown below: This cursor can be used to update any field from the underlying data set.
To make things even more specific you can list which columns from the data set you would like to make updatable, as shown below: The code above ensures that only one field from the underlying data set can be updated.
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