1、like规则 name like ‘abc%‘ 重写为 name >= ‘abc‘ and name <‘abd‘ 可以避免全表扫描,走索引 2、between-and规则 sno between 10 and 20 重写为 sno >= 10 and sno <=20 如果数据库对between-and走索引,改为...
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其他好文 时间:
2014-08-10 13:12:42
阅读次数:
307
lucene特点及效果文章里就不说了,网上有的是。我就简单说下自己号码大全了解,正常 sql 查询时:name like '%继中%' 想必咱们一定理解这样不会走索引关键词挖掘的,然后就在多行数据等级查询相应时刻会很慢,对吧,由于数据库在一行行扫呢。所以咱们自然会想到怎样能让它走索引?解决方案之一:...
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编程语言 时间:
2014-08-10 12:41:30
阅读次数:
330
Nginx("engine x")是一个高性能的HTTP和反向代理服务器,也是一个IMAP/POP3/SMTP代理服务器
Nginx可以在大多数Unix like OS上编译运行,并有Windows移植版。它的的源代码使用2-clause BSD-like license
Nginx是一个很强大...
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其他好文 时间:
2014-08-09 13:23:18
阅读次数:
392
文本文件
i like china
i can play
just do it
i will cometrue my dream
come on!!!
源程序
/**
* 功能:2-5,2-6,2-7吧文件中的单词由后向前打印
* 时间:2014年7月30日21:27:12
* 作者:cutter_point
*/
#include
#include
#include
#i...
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编程语言 时间:
2014-08-09 11:48:17
阅读次数:
231
Alex doesn't like boredom. That's why whenever he gets bored, he comes up with games. One long winter evening he came up with a game and decided to play it.
Given a sequence a consisting of n integ...
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其他好文 时间:
2014-08-09 11:42:48
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311
Problem Description
bobo found an ancient string. The string contains only three charaters -- "(", ")" and "?".
bobo would like to replace each "?" with "(" or ")" so that the string is valid (d...
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其他好文 时间:
2014-08-08 18:15:06
阅读次数:
273
Problem C
If We Were a Child Again
Input: standard input
Output: standard output
Time Limit: 7 seconds
“Oooooooooooooooh!
If I could do the easy mathematics like my school days!!
I...
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编程语言 时间:
2014-08-08 18:10:16
阅读次数:
281
Problem Description
I’ve bought an orchard and decide to plant some apple trees on it. The orchard seems like an N * M two-dimensional map. In each grid, I can either plant an apple tree to get one...
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移动开发 时间:
2014-08-08 16:13:06
阅读次数:
281
Any class that manages a resource (awrapper, like a smart pointer) needs to implementThe Big Three. While the goals and implementation of the copy-con...
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其他好文 时间:
2014-08-08 15:51:06
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262
/*首字母变大写
Input
输入数据包含多个测试实例,每个测试实例是一个长度不超过100的英文句子,占一行。
Output
请输出按照要求改写后的英文句子。
Sample Input
i like acm
i want to get an accepted
Sample Output
I Like Acm
I Want To Get An Accepted
...
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其他好文 时间:
2014-08-08 09:42:02
阅读次数:
201