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