83 lines
2.8 KiB
MySQL
83 lines
2.8 KiB
MySQL
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-- ========================================
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-- 修复题目答案格式问题
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-- 将包含完整格式的答案（如"B. 选项内容"）转换为纯字母（如"B"）
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-- ========================================
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-- 备份数据
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CREATE TABLE IF NOT EXISTS question_backup_20251205 AS SELECT * FROM question;
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-- 查看需要修复的数据
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SELECT
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id,
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SUBSTRING(question_content, 1, 30) AS 题目,
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correct_answer AS 当前答案,
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CASE
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WHEN correct_answer LIKE '%,%' THEN
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-- 多选题：提取字母部分（如 "A. 选项1, B. 选项2" → "A,B"）
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TRIM(CONCAT_WS(',',
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IF(correct_answer LIKE '%A.%', 'A', NULL),
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IF(correct_answer LIKE '%B.%', 'B', NULL),
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IF(correct_answer LIKE '%C.%', 'C', NULL),
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IF(correct_answer LIKE '%D.%', 'D', NULL),
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IF(correct_answer LIKE '%E.%', 'E', NULL),
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IF(correct_answer LIKE '%F.%', 'F', NULL)
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))
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WHEN correct_answer LIKE '%.%' THEN
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-- 单选题：提取字母部分（如 "B. 选项内容" → "B"）
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SUBSTRING(correct_answer, 1, 1)
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ELSE
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correct_answer
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END AS 修复后答案
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FROM question
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WHERE correct_answer LIKE '%. %';
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-- 修复数据：将完整格式的答案转换为纯字母
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-- 注意：此SQL需要手动执行，执行前请检查上面的查询结果
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-- UPDATE question
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-- SET correct_answer = CASE
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-- WHEN correct_answer LIKE '%,%' THEN
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-- -- 多选题：提取字母部分
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-- REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(
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-- correct_answer,
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-- 'A. ', 'A,'),
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-- 'B. ', 'B,'),
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-- 'C. ', 'C,'),
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-- 'D. ', 'D,'),
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-- 'E. ', 'E,'),
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-- 'F. ', 'F,')
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-- WHEN correct_answer LIKE '%. %' THEN
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-- -- 单选题：提取字母部分
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-- SUBSTRING(correct_answer, 1, 1)
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-- ELSE
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-- correct_answer
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-- END
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-- WHERE correct_answer LIKE '%. %';
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-- 更简单的修复方法：
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UPDATE question
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SET correct_answer = SUBSTRING(correct_answer, 1, LOCATE('.', correct_answer) - 1)
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WHERE correct_answer LIKE '%. %'
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AND correct_answer NOT LIKE '%,%'; -- 只处理单选题
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-- 多选题的修复（复杂，需要逐个处理）
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-- 示例：ID 184 的题目
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-- 原答案："A. 顺丰的高度官方的,B. 多少分多少多少,C. 撒地方收到"
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-- 应改为："A,B,C"
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UPDATE question
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SET correct_answer = 'A,B,C'
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WHERE id = 184;
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-- 验证修复结果
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SELECT
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id,
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SUBSTRING(question_content, 1, 30) AS 题目,
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correct_answer AS 答案,
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question_type AS 题型
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FROM question
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WHERE id IN (37, 164, 166, 184);
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-- 注意事项：
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-- 1. 执行前请先备份数据库
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-- 2. 执行UPDATE前先查看SELECT结果确认无误
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-- 3. 如有疑问请手动检查并修复
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