这是南京大学计算机系数据库教学课件，主要对原理部分进行了详细的解释-This is a database of Nanjing University, Department of Computer Science courseware, the main part of the principle explained in detail

江苏省南京市南京邮电大学数据库原理代码及实验报告-Experimental source database theory and experimental code Nanjing University of Posts and Telecommunications Report