How much EJB I should to know?

Hi
Experts.
Hi i am making Guest house management system for a company in SAP netweaver and backend is oracle 10g.
i learned basics of sap webDynpro like
-->Navigation between views.
-->Context programming
-->Internationalization
-->Basic UI components like input field, table,.....
-->Dynamic programming.
Now to make this project efficient i have to know EJB to access database.
I don't know anything about EJB.
So how much EJB i need to know?
and what other things i need to know please provide good reference.
I am beginner in SAP webdynpro.
but I have good programming skills and learning skills.
Is there any good tutorials available for all this EJB and web dynoro connectivity?
and good tutorial with examples that teaches how to connect oracle and EJB?
and how to merge all this things?
Regards
Sunny Shah.

Hi
Check thesse links they maybe helpful to you
Webdynpro and Oracle
Oracle DB connectivity using EJB.
http://help.sap.com/saphelp_nw04/helpdata/en/b5/3f533e5ff4d064e10000000a114084/frameset.htm
oracle connection
http://help.sap.com/saphelp_nw04s/helpdata/en/86/f8fdceffa642d08cd198da565dbbbe/frameset.htm
http://help.sap.com/saphelp_nw04s/helpdata/en/d3/44d0ea14539a4f9b8ec204cedee9bf/frameset.htm
http://help.sap.com/saphelp_nw04/helpdata/en/e0/a00e408230c442e10000000a1550b0/frameset.htm
https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/0736159e-0301-0010-9ea4-c63d83d0797b
Regards
SURYA

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