摘要：
51.Whiledesigningyourdatabase,youhavecreatedtheEMPLOYEEStableasanindex-organizedtable(IOT).YouwanttocreateabitmapindexontheJOB_IDcolumntomakequeriesfaster.Whichtaskmusthavebeencompletedsothatyouareabletocreatethebitmapindex?A.Aprimarykeymusthavebeencreated.B.Amappingtablemusthavebeencreated.C.Anover 阅读全文
posted @ 2011-10-05 23:01 little健健 阅读(3234) 评论(4) 推荐(0) 编辑