Question: GIven the table. QUery should return product banana, Cheese was entered only once. Therefore, there is no enough data to make a comparison: For second

GIven the table. QUery should return product banana, Cheese was entered only once. Therefore, there is no enough data to make a comparison:

For second case, query should return product T-shirt and book.

Assumption:

key(product, date) is unique that is each product can change in price at most once a day.

column price contains only positive values.

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