自己制作的关于Oracle11g的ppt。前半部分介绍了oracle的安全机制，后半部分介绍了oracle 11g的新特性-The first part introduces the oracle of the security mechanisms, the latter part introduces the oracle 11g new features

很好的自用的PPT，设计合理，精心制作的。适合初学者的。-Good for their own use of PPT, designed, carefully crafted. For beginners.

适合初学者的数据库PPT ，设计合理，精心制作的。-Database suitable for beginners PPT, designed, carefully crafted.