Thanks a lot !!
I am not sure about my final goal,and my goal now is to be a DBA ,so would you like to tell me the differences such as way , material and so on between the DBA learning or the developer learning and give some advices of choosing one from them two?

hi,samdba,what do you mean by concepts ?you mean the concept document downloading from otn.oracle.com?is it very useful ?should I read it first?

[Edited by andyliu on 05-01-2002 at 11:02 PM]