56 lines
1.7 KiB
SQL
56 lines
1.7 KiB
SQL
-- ============================================
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-- 删除 user_id >= 100 的用户及其关联数据
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-- 只删除：用户、学习记录、语音评测、课程分配
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-- 保留：admin(1), ry(2) 等系统用户
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-- 执行前请先备份数据库！
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-- ============================================
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-- 关闭外键检查（加快删除速度）
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SET FOREIGN_KEY_CHECKS = 0;
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-- ============================================
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-- 1. 删除学习记录
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-- ============================================
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-- 删除学习详情记录
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DELETE FROM learning_detail WHERE student_id >= 100;
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-- 删除学习记录
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DELETE FROM learning_record WHERE student_id >= 100;
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-- ============================================
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-- 2. 删除语音评测记录
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-- ============================================
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DELETE FROM voice_evaluation WHERE student_id >= 100;
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-- ============================================
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-- 3. 删除课程分配（只删除该用户的分配，不影响课程本身）
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-- ============================================
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DELETE FROM course_assignment WHERE student_id >= 100;
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-- ============================================
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-- 4. 删除用户
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-- ============================================
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DELETE FROM sys_user WHERE user_id >= 100;
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-- 恢复外键检查
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SET FOREIGN_KEY_CHECKS = 1;
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-- ============================================
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-- 验证结果
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-- ============================================
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-- 查看剩余用户数量
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SELECT COUNT(*) AS '剩余用户数' FROM sys_user;
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-- 查看剩余用户列表
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SELECT user_id, user_name, nick_name FROM sys_user ORDER BY user_id;
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-- 确认课件未受影响
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SELECT COUNT(*) AS '课件数量' FROM courseware;
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SELECT COUNT(*) AS '课程数量' FROM course;
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SELECT COUNT(*) AS '评测内容数量' FROM voice_evaluation_content;
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