36 lines
1.0 KiB
MySQL
36 lines
1.0 KiB
MySQL
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-- ========================================
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-- 查询数据库中所有的学生相关表
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-- ========================================
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-- 1. 查询所有表名（包含student或study的表）
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SELECT table_name, table_rows, table_comment
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FROM information_schema.tables
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WHERE table_schema = 'study'
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AND (table_name LIKE '%student%'
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OR table_name LIKE '%study%'
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OR table_name LIKE '%class%')
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ORDER BY table_name;
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-- 2. 查询所有表名（完整列表）
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SELECT table_name
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FROM information_schema.tables
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WHERE table_schema = 'study'
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ORDER BY table_name;
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-- 3. 查询用户表结构（看看是否有user_type字段区分学生）
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SHOW COLUMNS FROM sys_user;
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-- 4. 查询用户表中的用户类型分布
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SELECT user_type, COUNT(*) AS count
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FROM sys_user
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GROUP BY user_type;
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-- 5. 如果有study_student_class表，查询其结构
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SELECT table_name
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FROM information_schema.tables
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WHERE table_schema = 'study'
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AND table_name = 'study_student_class';
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-- 如果存在，查询结构
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-- SHOW COLUMNS FROM study_student_class;
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