that´sounds strange but I think that all you need is the standard documentation from Oracle. Everything important is explained in this paper. But if you have detailed problems
just post the here.
More great sides are www.orafaq.net www.dbaclick.com www.oracle.com (Ask TOM)
When you know SQL there is no problem to start with you development.
Just another hint: Use AlligatorSQL to test you SQL against the database
you are familiar with. And then change the connection to Oracle and try again.
The supported databases ar Oracle8i/9i, DB2, MSSQL, MySQL, Interbase, PostgreSQL, Birdstep and in version 1.12 Ingres.