32 lines
688 B
MySQL
32 lines
688 B
MySQL
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-- 检查教师表中擅长科目字段的数据情况
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SELECT
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id,
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teacher_name,
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real_name,
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subjects,
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audit_status,
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create_time
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FROM teacher
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WHERE deleted = 0
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ORDER BY create_time DESC
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LIMIT 10;
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-- 检查subjects字段为空的记录数
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SELECT
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COUNT(*) as total_teachers,
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COUNT(CASE WHEN subjects IS NULL OR subjects = '' THEN 1 END) as empty_subjects,
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COUNT(CASE WHEN subjects IS NOT NULL AND subjects != '' THEN 1 END) as has_subjects
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FROM teacher
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WHERE deleted = 0;
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-- 查看有subjects数据的记录样本
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SELECT
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id,
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teacher_name,
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subjects
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FROM teacher
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WHERE deleted = 0
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AND subjects IS NOT NULL
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AND subjects != ''
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LIMIT 5;
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