第三版和第四版差不多！有讲义.... 有些题目答案不全。。不好意思-Third edition and fourth edition of almost! Have handouts。 Thank you to download this part!

这是数据库系统概论（第三版）课后习题答案（陈诚），对复习会有所用。-This is the Introduction to Database System (third edition) after-school Exercise answers (Chen Cheng), the review will be used.

Access数据库应用基础教程（第三版）习题及答案-Access database application based tutorial problem sets and answers