database\ch10 database recovery.ppt ........\ch6 exercise new.ppt ........\ch7 memory and file structure.ppt ........\ch8 index.ppt ........\ch9. transaction.ppt ........\Database[1].System.Concepts.4th.Edition-007120489X.pdf ........\ppt(ch1-ch6).rar ........\复习.ppt ........\数据库系统概念中文版.pdf database