First thing , Install a database on your own machine and do all the practise on it . I believe more practise , more experience you gain . You can start with understanding the globe picture of oracle including Database , User , Shema , Tablespace , Datafile . make clear the relationship between them and then you can step into the details
如果你对PL/Sql比较熟悉,就应该学学管理,什么备份,安全,复制,分布,优化,分区等技术,另外Oracle的WEB功能也不错,如果你会C、VC还可以学学Pro*C,这些都是Oracle的精华。另外关于后台的存储过程,触发器,函数包和异常等也是PL/sql的精华。下载几本书看看,多实践,进步一定很快。
http://superexam.myetang.com/ocp/index.html
http://soft.269.net/SoftWareList.asp?ClasstreePos=24
http://www.oradb.net/book.htm
http://flying.swpi.edu.cn/books/dnwl/cxsj/oracle/index.html
http://easycome.myrice.com/bookstore/oracle.htm
http://www.kl.gz.cn/~hal/1-1-8.htm
http://www.ebooksou.com/search_leibie.asp?lei=4-2&word=Oracle
http://www.eng.stu.edu.cn/ebook/type/database.asp?did=0203
ORACLE资料
http://www.powerba.com/develop/database/oracle/index_12.htm