liyupi/sql-mother

关卡26 应该说明最后结果的列中不含class_id列吧

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pigxx500kg commented
关卡26 应该说明最后结果的列中不含class_id列吧
pigxx500kg commented

SELECT *, AVG(score) OVER (PARTITION BY class_id) AS class_avg_score FROM student;
语句错误，因为题目描述中遗漏了 exam_num 这一列，答案中也没有包含

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