[{"title":"( 6 个子文件 1.29MB ) 数据库系统基础教程,数据库小白必看","children":[{"title":"数据库系统基础教程","children":[{"title":"第2章 关系数据库.pdf <span style='color:#111;'> 331.45KB </span>","children":null,"spread":false},{"title":"第5章 数据库设计.pdf <span style='color:#111;'> 195.41KB </span>","children":null,"spread":false},{"title":"第4章 关系数据理论.pdf <span style='color:#111;'> 255.86KB </span>","children":null,"spread":false},{"title":"第6章 数据库保护.pdf <span style='color:#111;'> 195.73KB </span>","children":null,"spread":false},{"title":"第3章 SQL语言.pdf <span style='color:#111;'> 386.35KB </span>","children":null,"spread":false},{"title":"第1章 数据库概述.pdf <span style='color:#111;'> 264.08KB </span>","children":null,"spread":false}],"spread":true}],"spread":true}]