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            "title": "Find the Quiet Students in All Exams",
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            "difficulty": "Hard",
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            "exampleTestcases": "{\"headers\": {\"Student\": [\"student_id\", \"student_name\"], \"Exam\": [\"exam_id\", \"student_id\", \"score\"]}, \"rows\": {\"Student\": [[1, \"Daniel\"], [2, \"Jade\"], [3, \"Stella\"], [4, \"Jonathan\"], [5, \"Will\"]], \"Exam\": [[10, 1, 70], [10, 2, 80], [10, 3, 90], [20, 1, 80], [30, 1, 70], [30, 3, 80], [30, 4, 90], [40, 1, 60], [40, 2, 70], [40, 4, 80]]}}",
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            "sampleTestCase": "{\"headers\": {\"Student\": [\"student_id\", \"student_name\"], \"Exam\": [\"exam_id\", \"student_id\", \"score\"]}, \"rows\": {\"Student\": [[1, \"Daniel\"], [2, \"Jade\"], [3, \"Stella\"], [4, \"Jonathan\"], [5, \"Will\"]], \"Exam\": [[10, 1, 70], [10, 2, 80], [10, 3, 90], [20, 1, 80], [30, 1, 70], [30, 3, 80], [30, 4, 90], [40, 1, 60], [40, 2, 70], [40, 4, 80]]}}",
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                "Create table If Not Exists Student (student_id int, student_name varchar(30))",
                "Create table If Not Exists Exam (exam_id int, student_id int, score int)",
                "Truncate table Student",
                "insert into Student (student_id, student_name) values ('1', 'Daniel')",
                "insert into Student (student_id, student_name) values ('2', 'Jade')",
                "insert into Student (student_id, student_name) values ('3', 'Stella')",
                "insert into Student (student_id, student_name) values ('4', 'Jonathan')",
                "insert into Student (student_id, student_name) values ('5', 'Will')",
                "Truncate table Exam",
                "insert into Exam (exam_id, student_id, score) values ('10', '1', '70')",
                "insert into Exam (exam_id, student_id, score) values ('10', '2', '80')",
                "insert into Exam (exam_id, student_id, score) values ('10', '3', '90')",
                "insert into Exam (exam_id, student_id, score) values ('20', '1', '80')",
                "insert into Exam (exam_id, student_id, score) values ('30', '1', '70')",
                "insert into Exam (exam_id, student_id, score) values ('30', '3', '80')",
                "insert into Exam (exam_id, student_id, score) values ('30', '4', '90')",
                "insert into Exam (exam_id, student_id, score) values ('40', '1', '60')",
                "insert into Exam (exam_id, student_id, score) values ('40', '2', '70')",
                "insert into Exam (exam_id, student_id, score) values ('40', '4', '80')"
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            "enableRunCode": true,
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