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    4.      java£¨ÕÆÎÕ£©°üÀ¨jdbc thin,ociµÈ4À಻ͬµÄÁ¬½Ó·½Ê½£¬ÐÔÄÜÉèÖã¬Ò»Ð©Öмä¼þµÄ֪ʶ
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             oracle sql hign performance tuning 2nd editon by guy  harrison        
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