SQL> SELECT/**//*+ INDEX (StudentInformation index_address_hobby )*/ * FROM StudentInformation WHERE hobby='??????';

??????????Oracle?????????裬????00.23??consistent gets 502??

???????????????????????00.02??consistent gets 361??

?????????Oracle?????????????????????ж????

????3??Oracle???????????Ч???????????????

??????????????У??????Oracle???????????Ч??????????1.??????????????????2.????????????3.???????????????????????Oracle??????????????Oracle??????в?????Oracle????????????????????????????????????????

???????????????????в???????????????????????????????????á?