分类: Oracle
2008-05-16 20:35:22
来源: |
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问题:我在工作中遇到了难题,一列数据,除了时间戳以外别的都一样,谁能我,应该如何来选择?
解答:
--假如知道timestamp的值 select * from table where timestamp = 0x00000000000007EA --不知道值 --第二列 select top 1 * from table where timestamp not in (select top 1 timestamp from table ) --第三列 select top 1 * from table where timestamp not in (select top 2 timestamp from table ) --第四列 select top 1 * from table where timestamp not in (select top 3 timestamp from table ) |