本文介绍一个纯C语言实现的迷你DBMS课程设计项目，聚焦CREATE TABLE与ALTER TABLE语句的解析、内存建模（三维字符数组）、元数据持久化（table.txt文本协议）及基础DDL功能扩展。涵盖手写词法分析器、字段约束解析、ASCII码类型长度提取、清空重写式文件存储等核心技术点，适用于数据库原理教学与C ...

数据库管理系统（DBMS）本质是将SQL语句转化为内存结构与磁盘存储的执行引擎。其核心原理涵盖词法解析、元数据建模、文本持久化与命令行交互四层架构。在教学与工程实践中，理解CREATE/ALTER TABLE等DDL语句如何被手工解析、校验、映射为字段类型、约束条件及长度信息，是掌握关系型数据库底层 ...

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CREATE INDEX idx_training_programs_status ON training_programs(status); CREATE INDEX idx_training_programs_featured ON training_programs(featured); CREATE INDEX idx_training_programs_slug ON ...