41 lines
1.0 KiB
SQL
41 lines
1.0 KiB
SQL
-- ========================================
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-- 修复编号206的班级数据
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-- 只保留最新的班级（高级班1班），其他设为status=0
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-- ========================================
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-- 第一步：确认当前数据
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SELECT
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sc.id,
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sc.student_id,
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sc.class_id,
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c.class_name,
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sc.status,
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sc.join_time
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FROM student_class sc
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LEFT JOIN class c ON sc.class_id = c.id
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WHERE sc.student_id = 206
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ORDER BY sc.join_time DESC;
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-- 第二步：执行修复（将旧班级设为status=0）
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-- ⚠️ 确认上面查询结果后再执行这条！
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UPDATE student_class
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SET status = 0
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WHERE student_id = 206
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AND status = 1
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AND id IN (4472, 4443); -- 中级班1班、初级班1班
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-- 第三步：验证修复结果
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SELECT
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sc.id,
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sc.student_id,
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sc.class_id,
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c.class_name,
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sc.status,
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sc.join_time
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FROM student_class sc
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LEFT JOIN class c ON sc.class_id = c.id
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WHERE sc.student_id = 206
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ORDER BY sc.status DESC, sc.join_time DESC;
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-- 应该只有一条status=1的记录（高级班1班）
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