mysql – 根据子查询的结果更新表中的多行
我有以下查询：SELECT stat.mcq_id, ROUND( stat.total_score / stat.num_taken, 2 ) AS avg_score FROM ( SELECT user_mcq.mcq_id, SUM( score ) AS total_score,
我有以下查询：SELECT stat.mcq_id, ROUND( stat.total_score / stat.num_taken, 2 ) AS avg_score FROM ( SELECT user_mcq.mcq_id, SUM( score ) AS total_score,