最適なデータベースを選択するために考慮するべきこと - Qiita{"name": "佐藤", "age": 22, "edu-background": "Hoge University"}, {"name": "鈴木", "age": 24, "edu-background": "Fuga University", "foreign-lang": ["English", "Spanish"]}, {"name": "髙橋", "age": 25, "edu-background": "Fuga University", "foreign-lang": ["English"], "written-book": ["Intro to DB"]}, {"name": "田中", "age": 33, "edu-background": "Foo University", "written-book": ["Intro to Java", "Advanced
