33 lines
747 B
SQL
33 lines
747 B
SQL
-- 1. 检查学习详情表是否有数据
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SELECT * FROM learning_detail
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WHERE student_id = 452
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AND course_id = 1
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ORDER BY create_time DESC
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LIMIT 20;
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-- 2. 检查学习记录表
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SELECT * FROM learning_record
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WHERE student_id = 452
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AND course_id = 1;
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-- 3. 检查学习详情表结构
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DESC learning_detail;
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-- 4. 统计学习详情数量
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SELECT
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student_id,
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course_id,
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courseware_id,
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COUNT(*) as record_count,
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MAX(create_time) as latest_time,
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MAX(video_end_position) as max_position
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FROM learning_detail
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WHERE student_id = 452
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AND course_id = 1
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GROUP BY student_id, course_id, courseware_id;
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-- 5. 检查最近的插入记录（所有学生）
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SELECT * FROM learning_detail
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ORDER BY create_time DESC
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LIMIT 10;
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