hi now a days im doig sql n im using oracle 9i for this.
now a days my instructor teaching me about select command but im not able to use it on oracle 9i because i didn't create anything, so please can any body tell me that am i going in right way.
are there some tables present in oracle 9i by default for practice.
if not can any body tell me how i create directly just for practice select statement because i will learn create command later.
please help me.

There will be a DEMOBUILD.SQL file in oracle parent folder .
Run the script that will create some default tables for you.

thanks for showing ur interest
but i m still in problem in my system at location
there are two text files named demobld and demodrop. are u talking about these, if yes then please tell me what exactly to do.
otherwise please tell me the exact location, my directory structure u can can analyze easily by using above mentioned.
please help me.
thanks once again.

that will be a .SQL file.

If you installed the DB server then that fill will be in your system.

else find that here.