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[leetcode]Word Search
问题描述: Given a 2D board and a word, find if the word exists in the grid. The word can be constructed from letters of sequentially adjacent cell, where "adjacent" cells are those horizontally or ver...
分类:其他好文   时间:2014-11-05 23:16:53    阅读次数:262
SQL SERVER先判断视图是否存在然后再创建视图的语句
如果我们的语句为:?12345678910111213IF NOT EXISTS(SELECT 1 FROM sys.views WHERE name='Report_IndividualTicket') BEGINcreate view Report_IndividualTicket asSELE...
分类:数据库   时间:2014-11-05 18:59:38    阅读次数:319
Oracle 11g 递归+ exists执行计划的改变
有一个递归查询在10g上运行很快,但在11g上运行不出来。 SQL> select * from v$version; BANNER -------------------------------------------------------------------------------- Oracle Database 11g Enterprise Edition Release 1...
分类:数据库   时间:2014-11-05 17:25:37    阅读次数:277
sql中in/not in 和exists/not exists的用法区别
1;首先来说in/not in的用法       in/not in是确定单个属性的值是否和给定的值或子查询的值相匹配;       select * from Student s where s.id in(1,2,3); select * from Student s where s.name in( select distinct name from Proje...
分类:数据库   时间:2014-11-05 17:25:36    阅读次数:270
PHP单例模式实现数据库连接
class?DB { ????private?$db_config?=?‘./config.php‘; ????private?static?$_instance; ????private?function?__construct() ????{ ????????if?(file_exists($this->db_conf...
分类:数据库   时间:2014-11-05 13:13:47    阅读次数:210
Intellij 12 error: the root already belong to .....
The following processes can solve this problem:1.open the project strcture2.select the top moudle of the project3.In the tab of sources,deleting the C...
分类:其他好文   时间:2014-11-05 00:20:39    阅读次数:252
Segment
Description Given n segments in the two dimensional space, write a program, which determines if there exists a line such that after projecting these segments on it, all projected segments have at...
分类:其他好文   时间:2014-11-04 22:55:12    阅读次数:258
this web application instance has been stopped already. Could not load java.net.BindException
最近做项目的时候报了一个错误:Illegalaccess:thiswebapplicationinstancehasbeenstoppedalready.Couldnotloadjava.net.BindException.。。。。。。java.lang.IllegalStateException上网找了很多资料都说是配置文件修改一下就好了,但是我的改了没有用。我是用的是ssh框架,发..
分类:移动开发   时间:2014-11-04 19:53:50    阅读次数:176
[leetcode]Find Minimum in Rotated Sorted Array
问题描述: Suppose a sorted array is rotated at some pivot unknown to you beforehand. (i.e., 0 1 2 4 5 6 7 might become 4 5 6 7 0 1 2). Find the minimum element. You may assume no duplicate exists ...
分类:其他好文   时间:2014-11-04 17:26:17    阅读次数:253
org.springframework.dao.DuplicateKeyException: 问题
org.springframework.dao.DuplicateKeyException: a different object with the same identifier value was already associated with the session: [com.sinosof...
分类:编程语言   时间:2014-11-04 15:00:37    阅读次数:169
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