nick null

Drop table test; Select count (*) from test;-- Create a test tableCreate Table Test(ID number (9 ),Nick varchar2 (30)); -- Insert Test DataBeginFor I in 1 .. 100000 LoopInsert into test (ID) values (I );End loop;Commit;End; Select * from test; --

Drop table test; Select count (*) from test;-- Create a test tableCreate Table Test(ID number (9 ),Nick varchar2 (30)); -- Insert Test DataBeginFor I in 1 .. 100000 LoopInsert into test (ID) values (I );End loop;Commit;End; Select * from test; --

JavaScript is an interpretive programming language, mainly to enhance the dynamic effect of HTML pages JavaScript is made up of three parts: ECMAScript, BOM, DOM Single-line comment//multi-line/* */ Introduce the way to introduce

This article is http://www.51osos.com/a/Linux_CentOS_RedHat/Linuxjichu/2010/1025/curl.html and http://hi.baidu.com/yschen0925/ Summary of the blog/item/d62851072f10eaca7b894790.html. Today 51 open Source to give you a detailed explanation curl this

1. Open the GZIP requestCurl-i http://www.sina.com.cn/-H accept-encoding:gzip,defalte2, monitoring the response time of the Web pageCurl-o/dev/null-s-W "time_connect:%{time_connect}\ntime_starttransfer:%{time_starttransfer}\ntime_total:%{time_ total}

Analysis of MySQL's tips for optimizing distinct, mysqldistinct There is a need: select count (distinct nick) from user_access_xx_xx; This SQL statement is used to calculate the uv of user access. Because the data volume in a single table is more

Php/** * Class Rpt Redis is used to cache basic storage and read-Write 2.0 * @simple * rpt::read ("Diamond.account", $nick); * Rpt::readsync ("Diamond.accoun T ", $nick); * $finder = Rpt::createfinder ("Diamond.account", $nick); * $finder->read (); *

PHP/** * Class Rpt Redis is used to cache basic storage and read-Write 2.0 * @simple * rpt::read ("Diamond.account", $nick); * Rpt::readsync ("Diamond.accoun T ", $nick); * $finder = Rpt::createfinder ("Diamond.account", $nick); * $finder->read (); *

The token Verification Mechanism of Struts can be used to bypass verification by some odd tricks, so that csrf can be used. Impact scope: Struts2 all versionThis vulnerability was discovered by @ Sogili Because the token Verification provided by

Original address: http://blog.sina.com.cn/s/blog_4b9eab320100slyw.html Can be viewed as a command line browser 1. Open the GZIP requestCurl-i http://www.sina.com.cn/-H accept-encoding:gzip,defalte2, monitoring the response time of the Web pageCurl-o/