最近MongoDB University（https://education.mongodb.com/）の解説
Quiz: JSON Subdocuments
Q.
Write a JSON document with a single key, "address" that has as it value another document with the keys “street_address”, “city”, “state”, “zipcode”, with the following values: “street_address” is "23 Elm Drive", “city” is "Palo Alto", “state” is "California", “zipcode” is "94305"
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A.
