22 lines
557 B
SQL
22 lines
557 B
SQL
-- 正确的SQL查询（根据实际表结构）
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-- 1. 查询课件表中的文件路径（最重要）
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SELECT id, title, type, file_path, file_size, file_name, create_time
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FROM courseware
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ORDER BY create_time DESC
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LIMIT 10;
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-- 2. 查询课程表（看看有没有图片字段）
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DESC course;
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-- 3. 查看courseware表的完整结构
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DESC courseware;
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-- 4. 统计不同路径前缀的文件数量
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SELECT
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SUBSTRING_INDEX(file_path, '/', 3) AS path_prefix,
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COUNT(*) AS file_count
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FROM courseware
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WHERE file_path IS NOT NULL
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GROUP BY path_prefix;
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