在数据库表中,使用索引可以大大提高查询速度。All storage engines
support at least 16 indexes per table and a total index length of at least 256
bytes. Most storage engines h...
分类:
数据库 时间:
2014-05-26 21:23:17
阅读次数:
349
The most known area of theJordan 6 Carminemay
be the two-finger pull-up tongue and also the button lower shroud that hides top
of the a part of its la...
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其他好文 时间:
2014-05-26 21:03:46
阅读次数:
333
Problem Description
Today is Yukari's n-th birthday. Ran and Chen hold a celebration party for her. Now comes the most important part, birthday cake! But it's a big challenge for them to place n ca...
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其他好文 时间:
2014-05-26 04:38:35
阅读次数:
239
The Jordan 6 Carmine have inclination is easily
the most popular release of year. Which is without being aware of what other
shoes are likely to relea...
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其他好文 时间:
2014-05-26 02:40:58
阅读次数:
273
一. 准备知识:ORACLE的逻辑存储管理. ORACLE在逻辑存储上分4个粒度: 表空间, 段, 区
和 块. 1.1 块:
是粒度最小的存储单位,现在标准的块大小是8K,ORACLE每一次I/O操作也是按块来操作的,也就是说当ORACLE从数据文件读数据时,是读取多少个块,而不是多少行.
每一个...
分类:
数据库 时间:
2014-05-24 14:13:17
阅读次数:
505
This Saturday marks probably the most
anticipated Jordans releases of the season - theAir Jordan 6. Honoring 23 years
because the original discharge o...
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其他好文 时间:
2014-05-23 08:28:33
阅读次数:
254
Given n non-negative integers representing an
elevation map where the width of each bar is 1, compute how much water it is
able to trap after raining....
分类:
移动开发 时间:
2014-05-23 03:59:43
阅读次数:
364
5道题目分别是:【Subsets】、【Subsets II】、【Unique Paths】、【Unique Paths II】、【Trapping Rain Water 】,由于有一些题目不需要发一整篇博文来记录,所以就将这些题目以一篇博文5道来记录。...
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其他好文 时间:
2014-05-22 08:35:03
阅读次数:
348
【题目】
Given n non-negative integers representing an elevation map where the width of each bar is 1, compute how much water it is able to trap after raining.
For example,
Given [0,1,0,2,1,0,1,3,2,1,2,1], return 6.
The above elevation map is represente...
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移动开发 时间:
2014-05-21 06:44:38
阅读次数:
359
给定一个向量,其中的每个元素代表了高度,比如height[3] = 5,说明在坐标轴中在点3处存在高度为5的竖线,这样所有的元素就形成一个琴状的形状,最后要求的就是两条竖线之间的矩形形状最大的面积。最直觉的做法就是穷举,这样的复杂度是O(n2),显然还有更合适的方法,因为在这样的方法中有很多确定要小的面积也进行了计算。关于面积有两个变量,一个是横轴之间的距离,;另一个是两条竖轴之间的距离。我们可以固定其中一个变量,很显然,我们可以先取最远的两条竖线进行比较,然后使两个辅助指针逐渐缩小,取两个辅助指针中的较小...
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其他好文 时间:
2014-05-20 15:44:28
阅读次数:
227