70 lines
1.7 KiB
MySQL
70 lines
1.7 KiB
MySQL
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USE study;
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-- 1. 查看所有没有正确答案的题目
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SELECT
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id,
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question_type,
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LEFT(question_content, 40) AS content,
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correct_answer,
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CASE
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WHEN correct_answer IS NULL OR correct_answer = '' THEN 'EMPTY'
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ELSE 'OK'
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END AS status
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FROM question
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WHERE correct_answer IS NULL OR correct_answer = ''
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ORDER BY id;
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-- 2. 查看题库中没有正确答案的题目
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SELECT
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id,
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bank_id,
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question_type,
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LEFT(question_content, 40) AS content,
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correct_answer,
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CASE
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WHEN correct_answer IS NULL OR correct_answer = '' THEN 'EMPTY'
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ELSE 'OK'
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END AS status
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FROM question_bank_item
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WHERE correct_answer IS NULL OR correct_answer = ''
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ORDER BY id;
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-- 3. 统计有问题的题目数量
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SELECT
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'考试题目' AS source,
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question_type,
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COUNT(*) AS count
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FROM question
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WHERE correct_answer IS NULL OR correct_answer = ''
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GROUP BY question_type
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UNION ALL
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SELECT
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'题库题目' AS source,
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question_type,
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COUNT(*) AS count
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FROM question_bank_item
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WHERE correct_answer IS NULL OR correct_answer = ''
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GROUP BY question_type;
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-- 4. 对于多选题，如果答案为空，可以设置一个默认值（需要手动确认）
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-- 警告：这会修改数据，请先备份！
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-- UPDATE question
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-- SET correct_answer = 'A'
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-- WHERE question_type = 'multiple'
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-- AND (correct_answer IS NULL OR correct_answer = '')
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-- AND id IN (具体的ID);
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-- 5. 查看特定考试的题目答案情况
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SELECT
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q.id,
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e.exam_name,
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q.question_type,
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LEFT(q.question_content, 30) AS content,
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q.correct_answer
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FROM question q
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LEFT JOIN exam e ON q.exam_id = e.id
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WHERE e.exam_name LIKE '%Test%'
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ORDER BY q.exam_id, q.id;
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