SELECT t.*, @RowNum := @RowNum + 1 AS RowNumFROM t, (SELECT @RowNum := 0) AS myRowsMySQL中没有ROW_NUMBER()函数,可以用以上代码替换。
分类:
数据库 时间:
2014-06-25 17:32:15
阅读次数:
248
Given an arraySofnintegers, find three integers inSsuch that the sum is closest to a given number, target. Return the sum of the three integers. You m...
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其他好文 时间:
2014-06-25 15:26:21
阅读次数:
203
Say you have an array for which theithelement is the price of a given stock on dayi.Design an algorithm to find the maximum profit. You may complete a...
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其他好文 时间:
2014-06-25 12:59:40
阅读次数:
202
Given a digit string, return all possible letter combinations that the number could represent.A mapping of digit to letters (just like on the telephon...
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其他好文 时间:
2014-06-25 12:09:43
阅读次数:
184
iOS开发多线程篇—线程的状态一、简单介绍线程的创建:self.thread=[[NSThread alloc]initWithTarget:self selector:@selector(test) object:nil];说明:创建线程有多种方式,这里不做过多的介绍。线程的开启:[self.th...
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移动开发 时间:
2014-06-25 11:55:02
阅读次数:
306
Given two wordsword1andword2, find the minimum number of steps required to convertword1toword2. (each operation is counted as 1 step.)You have the fol...
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其他好文 时间:
2014-06-25 11:14:15
阅读次数:
218
Given a linked list, reverse the nodes of a linked listkat a time and return its modified list.If the number of nodes is not a multiple ofkthen left-o...
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其他好文 时间:
2014-06-25 11:10:16
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163
Given a digit string, return all possible letter combinations that the number could represent.A mapping of digit to letters (just like on the telephon...
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其他好文 时间:
2014-06-25 09:15:12
阅读次数:
362
java.sql.SQLException: ORA-01789: query block has incorrect number of result columns
at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:125)
at oracle.jdbc.driver.T4CTTIoer...
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数据库 时间:
2014-06-25 07:39:35
阅读次数:
481
【题目】
Given a binary tree containing digits from 0-9 only, each root-to-leaf path could represent a number.
An example is the root-to-leaf path 1->2->3 which represents the number 123.
Find the total sum of all root-to-leaf numbers.
For example,
1
...
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其他好文 时间:
2014-06-25 07:32:27
阅读次数:
209