Oracle 随机获取N条数据
当我们获取数据时,可能会有这样的需求,即每次从表中获取数据时,是随机获取一定的记录,而不是每次都获取一样的数据,这时我们可以采取Oracle内部一些函数,来达到这样的目的1)
select * from (select * from tablename order b...
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数据库 时间:
2014-07-22 23:16:15
阅读次数:
434
MediaPlayer framework播放电影文件:iOS
sdk中可以使用MPMoviePlayerController来播放电影文件。但是在iOS设备上播放电影文件有严格的格式要求,只能播放下面两个格式的电影文件。?
H.264 (Baseline Profile Level 3.0)? M...
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移动开发 时间:
2014-05-01 13:55:15
阅读次数:
424
CRM 2011: 报价(Quote Detail)到订单(Order
Detail)的Mapping(MSCRM 2011 Mapping QuoteProduct to OrderProduct)由于QuoteProduct 到
OrderProduct 的mapping是隐藏的,我们在solu...
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移动开发 时间:
2014-05-01 13:45:37
阅读次数:
436
A quarry operator in the Libyan needed to
expand their crushing and screening plant in order to cope with an increase in
chip and sand demand from the...
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其他好文 时间:
2014-04-30 20:26:27
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646
题目: You are given two linked lists representing two
non-negative numbers. The digits are stored in reverse order and each of their
nodes contain a sin...
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其他好文 时间:
2014-04-30 18:44:23
阅读次数:
428
A LiveJournal course of developmentis a project
in the 99 years began in the campus, a few people do as a hobby such an
application, in order to achie...
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其他好文 时间:
2014-04-29 19:38:16
阅读次数:
589
Given a matrix ofmxnelements (mrows,ncolumns),
return all elements of the matrix in spiral order.For example,Given the
following matrix:[ [ 1, 2, 3 ],...
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其他好文 时间:
2014-04-29 10:37:46
阅读次数:
434
You are given two linked lists representing two
non-negative numbers. The digits are stored in reverse order and each of their
nodes contain a single ...
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其他好文 时间:
2014-04-29 10:17:46
阅读次数:
406
//: ORDER.CPP -- Order of constructor calls // with
inheritance#include #define inherit(derived, base) \class derived : public base
{ \public: \ deri....
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其他好文 时间:
2014-04-28 00:09:24
阅读次数:
444