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转:Linux - Load your root partition to RAM and boot it
This tutorial will guide you through the steps to modify your initramfs to load all files from / to atmpfs. This will only work with Debian or Ubuntu ...
分类:系统相关   时间:2015-05-18 16:27:13    阅读次数:294
MYSQL优化派生表(子查询)在From语句中的
Mysql 在5.6.3中,优化器更有效率地处理派生表(在from语句中的子查询): 优化器推迟物化子查询在from语句中的子查询,知道子查询的内容在查询正真执行需要时,才开始物化。这一举措提高了性能: 1:之前版本(5.6.3),from语句中的子查询在explain select ...
分类:数据库   时间:2015-05-18 16:26:27    阅读次数:257
How to Hide Apache Tomcat Version Number from Error Pages
1. 进入tomcat lib目录cd /usr/local/tomcat7/lib2. 解压catalina.jarjar xvf catalina.jar3. 修改ServerInfo.properteis文件vi org/apache/catalina/util/ServerInfo.prop...
分类:Web程序   时间:2015-05-18 16:16:22    阅读次数:128
Reverse Linked List II ****
Reverse a linked list from positionmton. Do it in-place and in one-pass.For example:Given1->2->3->4->5->NULL,m= 2 andn= 4,return1->4->3->2->5->NULL.No...
分类:其他好文   时间:2015-05-18 16:08:31    阅读次数:139
extremeDBsql 元数据查询语句
select * from Statistic; select * from IndexStatistic; select * from Metatable;...
分类:数据库   时间:2015-05-18 14:48:54    阅读次数:207
Access restriction: The method createJPEGEncoder(OutputStream) from the type JPEGCodec is not access
这是myeclipse 或者 eclipse的设置问题,它默认把这些受访问限制的API设成了ERROR,只要把Windows-Preferences-Java-Complicer-Errors/Warnings里面的DeprecatedandrestrictedAPI中的Forbiddenrefer...
分类:数据库   时间:2015-05-18 14:37:33    阅读次数:210
【leetcode】Remove Nth Node From End of List
Given a linked list, remove the nth node from the end of list and return its head.For example,Given linked list: 1->2->3->4->5, and n = 2. After remov...
分类:其他好文   时间:2015-05-18 14:27:38    阅读次数:90
sqlserver查询某一字段重复超5次的所有记录
用的sqlserver2008 r2。SELECT*FROM t_classWHERE idIN (SELECTidFROM (SELECTROW_NUMBER() OVER (PARTITION BY id ORDER BY inserttime) AS rn,idFROM t_class) my...
分类:数据库   时间:2015-05-18 14:16:47    阅读次数:142
thinkphp 调取两个表相同id的字段
sql语句 select * from think_neirong a,think_class b where a.class_id=b.id thinkphp语句 $Neirong = M("Neirong"); $con = $Neirong->alias('a')->join('think_class b ON a.class_id= b.id')->select(); 具体详...
分类:Web程序   时间:2015-05-18 12:54:55    阅读次数:95
sql 查询 a and b and (c or d);
SELECT * FROM [表名] WHERE [字段1]= ‘A’ And [字段2] = ‘B’ And ([字段3] = 888 OR [字段4] = 888 )...
分类:数据库   时间:2015-05-18 12:54:11    阅读次数:162
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