1. To auto-populate the update dialog with an item, we needed to query for only that item. How do we do that?
Specify a selection (where clause) with the id
Specify a projection (columns) with the id

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2. What value does the database's update() method return?
Nothing. It is a void method, which is why we didn't assign a return value to a variable.
A boolean telling whether or not it was successful.
An int telling how many rows were updated.

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