Well i must agree to you but improvisation can be done and I just give here is the sample to understand logic behind it...
I must bound to give solution which is generic in nature.
Also enterprise...

Cehck this site for Thinking in Java By Bruce Eckel

http://www.planetpdf.com/developer/article.asp?ContentID=6632

It is free to download

Do one thing
Refer to good book and try examples from it.
And you need to solve exercise given.
You need to devote atleast 2 hrs a day to get job done.

Some good books on basics.

Java...

Here is example sql query for you.

put any integer value in place of N
e.g for first record N=1;
for 2nd record N=2; and so on....

Remember it is not optimized at this time. You may want to...