To find names containing exactly five characters, use “^”and “$”to match the beginning and end of thename, and five instances of “.”in between:mysql> SELECT * FROM pet WHERE name REGEXP '^.....$'; 或者 SELECT * FROM pet WHERE name REGEXP '^.{5}$';…

本文内容摘自MySQL5.6官方文档,主要选取了在实践过程中所用到的部分文字解释,力求只摘录重点,快速学会使用MySQL,本文所贴代码地方就是我亲自练习过的代码,凡本文没有练习过的代码都没有贴在此处,如果读者想自己尝试,可以查看官方文档,文中给出了原官方文档的对应链接以供查阅. 本文地址:http://www.cnblogs.com/yhLinux/p/4019386.html http://dev.mysql.com/doc/refman/5.6/en/tutorial.htmlThis ch…

We'll capture groups of characters we wish to match, use quantifiers with those groups, and use references to those groups in String.prototype.replace. Let's see we have set of similar string starting with 'foo' var str = ` foobar fooboo foobaz `; An…

登录数据库后,选择数据库时发现以下提示, mysql> use testReading table information for completion of table and column namesYou can turn off this feature to get a quicker startup with -A Database changedmysql> 意思是 预读这个库中表以及表列信息,一般原因是当库中表很多,表中数据很大时,就会出现执行use <库名>后半天…

Introduction DNF is the The Fedora Project package manager that is able to query for information about packages, fetch packages from repositories, install and uninstall packages using automatic dependency resolution, and update an entire system to th…

这的确是一个不正常的需求,按照规范,开发者需要将cookie进行编码,因为tomcat不支持中文cookie. 但有时候,你不得不面对这样的情况,比如请求是由他人开发的软件,比如,浏览器控件发出的. 这个时候就需要修改tomcat源码来支持了. 直接上源码 /* * Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE…

Chapter6 Controlling Database Location,Creation Process, and Seed Data 第6章 控制数据库位置,创建过程和种子数据 In previous chapters you have seen how convention and configuration can be used to affect the model and the resulting database schema. In this chapter you wi…

Total Commander 8.52 Beta 1http://www.ghisler.com/852_b1.php 10.08.15 Release Total Commander 8.52 beta 1 (32/64) 05.08.15 Fixed: Windows 10: Loading drive buttonbar hanging on some devices (e.g. Surface Pro 3) when SD-Card was in internal card reade…

最近在看 Faster RCNN的Matlab code,发现很多matlab技巧,在此记录: 1. conf_proposal  =  proposal_config('image_means', model.mean_image, 'feat_stride', model.feat_stride); function conf = proposal_config(varargin) % conf = proposal_config(varargin) % ------------------…

Mysql 5.7.17发布了,主要修复: Changes in MySQL 5.7.17 (2016-12-12, General Availability) Compilation Notes MySQL Enterprise Notes Packaging Notes Security Notes Test Suite Notes Functionality Added or Changed Bugs Fixed Compilation Notes For GCC versions hig…

1.修改默认添加用户权限为User,而非Powers User: 在/portal-master/portal-impl/src/portal.properties文件中有如下配置: # # Input a list of default role names separated by \n characters that are # associated with newly created users. # admin.default.role.names=Power User\nUser…

安装和配置Oozie Oozie用于Hadoop的工作流配置: 参考链接: <Install and Configure Apache Oozie Workflow Scheduler for CDH 4.X on RHEL/CentOS 6/5> http://www.tecmint.com/install-apache-oozie-for-cdh-in-centos/  (亲测可用) <How to Install Latest MySQL 5.7.9 on RHEL/CentOS…

2.2 Installing MySQL on Unix/Linux Using Generic Binaries Oracle provides a set of binary distributions of MySQL. These include binary distributions in the form of compressed tar files (files with a .tar.gz extension) for a number of platforms, as we…

What is JSON Web Token? JSON Web Token (JWT) is an open standard (RFC 7519) that defines a compact and self-contained way for securely transmitting information between parties as a JSON object. This information can be verified and trusted because it…

声明:原创作品,转载时请注明文章来自SAP师太技术博客( 博/客/园www.cnblogs.com):www.cnblogs.com/jiangzhengjun,并以超链接形式标明文章原始出处,否则将追究法律责任!原文链接:http://www.cnblogs.com/jiangzhengjun/p/4293511.html LDB程序中的Search Help 逻辑数据库提供了另外一种获得数据的方式,它可以代替Open SQL语句从数据库中读取数据.LDB不是一种可以进行数据存储的物理上的数据…

请问用Inno_Setup打包文件夹时怎么排除其中一个文件? 该文件夹下有几十个文件,多个文件夹,我要一个个加进去该累死,也容易出问题.不知道能不能实现我要的目的. http://www.jrsoftware.org/ishelp/index.php?topic=filessection Excludes Specifies a list of patterns to exclude, separated by commas. This parameter cannot be combined …

http://www.kalinskyassociates.com/Wpaper4.html Architecture of Device I/O Drivers Many embedded systems developers will tell you that writing a device driver consists of a lot of "bit-bashing and register-twiddling" to convince some ornery unit…

Music Mess Time Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://codeforces.com/gym/100463/attachments Description Francis really likes his music. He especially likes that song ’Zombie Nation’. Or was that the album? Or maybe the album was ’Kernkraft 4…

Hive Operators and User-Defined Functions (UDFs) Hive Operators and User-Defined Functions (UDFs) Built-in Operators Relational Operators Arithmetic Operators Logical Operators Complex Type Constructors Operators on Complex Types Built-in Functions M…

Built-in Operators Relational Operators The following operators compare the passed operands and generate a TRUE or FALSE value depending on whether the comparison between the operands holds. Operator Operand types       Description A = B All primitiv…

61. Evaluate the following SQL statements that are issued in the given order:CREATE TABLE emp(emp_no NUMBER(2) CONSTRAINT emp_emp_no_pk PRIMARY KEY,ename VARCHAR2(15),salary NUMBER(8,2),mgr_no NUMBER(2) CONSTRAINT emp_mgr_fk REFERENCES emp);ALTER TAB…

原文地址http://www.vogella.com/tutorials/EclipseRCP/article.html Table of Contents 1. Eclipse 4 1.1. What is Eclipse 4? 1.2. Eclipse 4 vs. Eclipse 3.x 1.3. Terminology 2. The Architecture of Eclipse 2.1. Eclipse based applications 2.2. Core components of…

http://freemarker.org/docs/ref_builtins_string.html Page Contents boolean cap_first capitalize chop_linebreak contains date, time, datetime ends_with ensure_ends_with ensure_starts_with esc groups html (deprecated) index_of j_string js_string json_st…

C++遍历目录,并把目录里超过7天的文件删除,适用于项目里删除过期的日志,或者视频文件. 在windows和linux下测试通过. windows测试结果: linux测试结果: 源码: #include <time.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include "dirent.h" #include <sys/stat.h> #i…

http://docs.oracle.com/javase/tutorial/essential/regex/index.html This lesson explains how to use the java.util.regex API for pattern matching with regular expressions. Although the syntax accepted by this package is similar to the Perl programming l…

Linux(CentOS 7)+ Nginx(1.10.2)+ Mysql(5.7.16)+ PHP(7.0.12) 首先安装Linux系统,我以虚拟机安装来做示例,先去下载 VitualBox,这是一款开源的虚拟机软件,https://www.virtualbox.org 官网地址.或者是VMware,www.vmware.com,不过这个软件是收费的.当然同时还要去下载一个Linux镜像,我下载是CentOS 7系统,https://www.centos.org/download 下载好了之…

Automake是用来根据Makefile.am生成Makefile.in的工具 标准Makefile目标 'make all' Build programs, libraries, documentation, etc. (same as 'make'). 'make install' Install what needs to be installed, copying the files from the package's tree to system-wide directories.…

Data Pump Export ATTACH Default: job currently in the user's schema, if there is only one Purpose(目的) Attaches the client session to an existing export job and automatically places you in the interactive-command interface. Export displays a descripti…

摘要 Hive内部提供了很多函数给开发者使用,包括数学函数,类型转换函数,条件函数,字符函数,聚合函数,表生成函数等等,这些函数都统称为内置函数. 目录 数学函数 集合函数 类型转换函数 日期函数 条件函数 字符函数 聚合函数 表生成函数     数学函数 Return Type Name (Signature) Description DOUBLE round(DOUBLE a) Returns the rounded BIGINT value of a. 返回对a四舍五入的BIGINT值 D…

一.安装httpd. mod_ssl. mysql-server . mysql .php-mysql . gcc . perl* . mod-perl-devel [root@localhost ~]# yum -y install httpd mod_ssl mysql-server mysql php-mysql gcc perl* mod_perl-devel [root@localhost ~]# service iptables stop  ##关闭防火墙 [root@localho…