ORACLE查询或删除时指定使用索引的写法­

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查询时可以指定使用索引的写法。­

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SELECT   /*+ index(TB_ALIAS IX_G_COST3) */­

  TB_ALIAS.*­

  FROM g_Cost TB_ALIAS­

WHERE Item_Two = 0­

   AND Flight_Date >= To_Date('20061201', 'YYYYMMDD')­

   AND Flight_Date <= To_Date('20061231', 'YYYYMMDD');&shy;

&shy;

删除时也可以指定使用索引的写法。&shy;

&shy;

DELETE   /*+ index(TB_ALIAS IX_G_COST1) */&shy;

  FROM g_Cost TB_ALIAS&shy;

WHERE ITEM_NAME = '小时费';&shy;

&shy;

IX_G_COST1，IX_G_COST3都是表G_COST的索引。