最快select id,name,content,time,re_id,is_replay from tb_content where re_id = 0 and id between 19993 and 19998 order by id desc大于10000条以上用select id,nam....
分类:
Web程序 时间:
2015-03-18 17:44:50
阅读次数:
164
Given an unsorted array, find the maximum difference between the successive elements in its sorted form.Try to solve it in linear time/space.Return 0 if the array contains less than 2 elements.You may...
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其他好文 时间:
2015-03-18 09:04:03
阅读次数:
154
本篇文章由:http://xinpure.com/difference-between-displaynone-and-visibilityhidden/区别分析首先我们都知道,display: none 和 visibility: hidden 都可以起到隐藏元素的功能两者的区别在于占用文档流的不...
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其他好文 时间:
2015-03-17 23:31:10
阅读次数:
284
此前的文章中,曾经提到在cocoapods依赖管理版本如果超过0.34.4,比如0.35, 0.36.0等版本中。执行"pod install" 或者 "pod update" , xmppframework 会出现循环依赖问题。
There is a circular dependency between XMPPFramework/Core and XMPPFramework/Authent...
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其他好文 时间:
2015-03-17 20:19:14
阅读次数:
146
本篇文章由:http://xinpure.com/css3-pseudo-class-difference-between-nthchild-and-nthoftype/首先来看看 nth-child(n) 和 nth-of-type(n) 的共同点两者唯一的共同点就是: 参数n的用法n 可以是数字...
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Web程序 时间:
2015-03-17 00:27:47
阅读次数:
190
TCP keep-alive的三个参数用man命令,可以查看linux的tcp的参数:man 7 tcp其中keep-alive相关的参数有三个: tcp_keepalive_intvl (integer; default: 75; since Linux 2.4)
The number of seconds between TCP keep-alive pr...
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其他好文 时间:
2015-03-16 19:19:08
阅读次数:
144
Given a binary tree, return the zigzag level order traversal of its nodes' values. (ie, from left to right, then right to left for the next level and alternate between).
For example:
Given binary tr...
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其他好文 时间:
2015-03-16 16:34:14
阅读次数:
107
A gas station has to be built at such a location that the minimum distance between the station and any of the residential housing is as far away as po...
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其他好文 时间:
2015-03-16 12:51:44
阅读次数:
137
Problem DescriptionThese are N cities in Spring country. Between each pair of cities there may be one transportation track or none. Now there is some ...
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其他好文 时间:
2015-03-15 19:36:48
阅读次数:
135
1、利用show profiles; show profile for query 4; 查看具体的信息,分析返回的时间.2、不做无所谓的排序,尽量在索引中完成.3、limit基数比较大时,使用between..and..,效率高.4、explain select 语句; 分析具体信息.5、对于in...
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数据库 时间:
2015-03-15 16:49:01
阅读次数:
190