D2K Forms and reports

Can any one tell me Where can i get good material to study f开发者_高级运维orms and reports in oracle.

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http://www.prenhall.com/oracle/tutorial/index.html

http://www.geekarticles.com/article/Tutorial-Oracle-Designer-2000-and-Developer-2000.html

http://www.intelligentedu.com/free_oracle_training.html

are some starter links