1.SQL.Puzzles.and.Answers.2nd.Edition.Sep.2006 2.Morgan.Kaufmann.Joe.Celkos.SQL.Programming.Style.Apr.2005.eBook-DDU 3.Joe Celko’s Analytics and OLAP in SQL 4.Joe Celko’s _Data_and_Databases_-_Concepts_in_Practice 5，Celko_-_Thinking_in_Sets_-_Auxiliary__Temporal_and_Virtual_Tables_in_SQL__Elsevier__2008_ 6.T R E E S A N D HIERARCHIES IN SQL FOR SMART I E S 喜歡看英文原版書籍的童鞋不應錯過！！！