118 lines
3.8 KiB
SQL
118 lines
3.8 KiB
SQL
-- ====================================
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-- 清理孤儿用户数据脚本
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-- 功能：删除那些引用了不存在的用户ID的数据
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-- 使用场景：当删除sys_user后，清理关联表中的残留数据
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-- ====================================
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-- 1. 查看孤儿数据统计（执行清理前先查看）
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-- ====================================
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-- 1.1 查看班级学生关联表中的孤儿数据
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SELECT '班级学生关联表(study_student_class)孤儿数据' AS 检查项, COUNT(*) AS 孤儿数据条数
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FROM study_student_class ssc
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WHERE NOT EXISTS (
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SELECT 1 FROM sys_user u WHERE u.user_id = ssc.user_id
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);
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-- 1.2 查看学习记录表中的孤儿数据
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SELECT '学习记录表(study_learning_record)孤儿数据' AS 检查项, COUNT(*) AS 孤儿数据条数
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FROM study_learning_record slr
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WHERE NOT EXISTS (
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SELECT 1 FROM sys_user u WHERE u.user_id = slr.student_id
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);
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-- 1.3 查看学习明细表中的孤儿数据
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SELECT '学习明细表(study_learning_detail)孤儿数据' AS 检查项, COUNT(*) AS 孤儿数据条数
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FROM study_learning_detail sld
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WHERE NOT EXISTS (
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SELECT 1 FROM sys_user u WHERE u.user_id = sld.student_id
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);
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-- 1.4 查看语音评测表中的孤儿数据
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SELECT '语音评测表(study_voice_score)孤儿数据' AS 检查项, COUNT(*) AS 孤儿数据条数
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FROM study_voice_score svs
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WHERE svs.student_id IS NOT NULL
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AND NOT EXISTS (
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SELECT 1 FROM sys_user u WHERE u.user_id = svs.student_id
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);
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-- ====================================
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-- 2. 执行清理（请先执行上面的查询确认后再执行清理）
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-- ====================================
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-- 2.1 清理班级学生关联表
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DELETE FROM study_student_class
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WHERE NOT EXISTS (
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SELECT 1 FROM sys_user u WHERE u.user_id = study_student_class.user_id
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);
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-- 2.2 清理学习记录表
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DELETE FROM study_learning_record
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WHERE NOT EXISTS (
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SELECT 1 FROM sys_user u WHERE u.user_id = study_learning_record.student_id
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);
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-- 2.3 清理学习明细表
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DELETE FROM study_learning_detail
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WHERE NOT EXISTS (
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SELECT 1 FROM sys_user u WHERE u.user_id = study_learning_detail.student_id
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);
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-- 2.4 清理语音评测表
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DELETE FROM study_voice_score
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WHERE student_id IS NOT NULL
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AND NOT EXISTS (
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SELECT 1 FROM sys_user u WHERE u.user_id = study_voice_score.student_id
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);
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-- ====================================
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-- 3. 验证清理结果
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-- ====================================
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-- 3.1 再次统计孤儿数据（应该为0）
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SELECT '班级学生关联表' AS 表名, COUNT(*) AS 剩余孤儿数据
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FROM study_student_class ssc
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WHERE NOT EXISTS (SELECT 1 FROM sys_user u WHERE u.user_id = ssc.user_id)
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UNION ALL
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SELECT '学习记录表', COUNT(*)
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FROM study_learning_record slr
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WHERE NOT EXISTS (SELECT 1 FROM sys_user u WHERE u.user_id = slr.student_id)
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UNION ALL
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SELECT '学习明细表', COUNT(*)
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FROM study_learning_detail sld
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WHERE NOT EXISTS (SELECT 1 FROM sys_user u WHERE u.user_id = sld.student_id)
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UNION ALL
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SELECT '语音评测表', COUNT(*)
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FROM study_voice_score svs
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WHERE svs.student_id IS NOT NULL
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AND NOT EXISTS (SELECT 1 FROM sys_user u WHERE u.user_id = svs.student_id);
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-- 3.2 查看当前有效用户统计
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SELECT
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'总用户数' AS 统计项,
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COUNT(*) AS 数量
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FROM sys_user
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WHERE user_id != 1 -- 排除管理员
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UNION ALL
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SELECT
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'学生数（按userName数字开头）',
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COUNT(*)
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FROM sys_user
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WHERE user_name REGEXP '^[0-9]' AND user_id != 1
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UNION ALL
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SELECT
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'班级关联学生数',
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COUNT(DISTINCT user_id)
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FROM study_student_class;
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-- ====================================
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-- 使用说明：
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-- 1. 先执行第1部分，查看有多少孤儿数据
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-- 2. 确认无误后，执行第2部分进行清理
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-- 3. 最后执行第3部分，验证清理结果
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--
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-- 注意事项：
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-- - 本脚本会永久删除数据，执行前请备份数据库！
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-- - 建议在测试环境先验证
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-- ====================================
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