Ubuntu
bitsCN.com在Linux下MySQL的安装,我一直觉得挺麻烦的,因为之前安装时就是由于复杂的配置导致有点晕。今天,需要在Linux下用Qt连接MySQL。遂安装配置了一把。
1)首先检查系统中是否已经安装了MySQL
在终端里面输入 sudo netstat -tap | grep mysql
若没有反映,没有显示已安装结果,则没有安装。若如下显示,则表示已经安装
2)如果没有安装,则安装MySQL.
在终端输入 sudo apt-get install mysql-server mysql-client
运行结果如下所示:
在此安装过程中会让你输入root用户(管理MySQL数据库用户,非Linux系统用户)密码,按照要求输入即可。如下所示:
3)测试安装是否成功:
在终端输入 sudo netstat -tap | grep mysql
出现如下结果则安装成功:
4)也可通过登录MySQL测试
在终端输入 mysql -uroot -p 接下来会提示你输入密码,输入正确密码,即可进入。如下所示:
5)MySQL的一些简单管理:
启动MySQL服务: sudo start mysql
停止MySQL服务: sudo stop mysql
修改 MySQL 的管理员密码: sudo mysqladmin -u root password newpassword
设置远程访问(正常情况下,mysql占用的3306端口只是在IP 127.0.0.1上监听,拒绝了其他IP的访问(通过netstat可以查看到)。取消本地监
听需要修改 my.cnf 文件:):
sudo vi /etc/mysql/my.cnf
bind-address = 127.0.0.1 //找到此内容并且注释
6)MySQL安装后的目录结构分析(此结构只针对于使用apt-get install 在线安装情况):
数据库存放目录: /var/lib/mysql/
相关配置文件存放目录: /usr/share/mysql
相关命令存放目录: /usr/bin(mysqladmin mysqldump等命令)
启动脚步存放目录: /etc/rc.d/init.d/
7)MySQL图形化管理软件
一般使用的有两个比较好,一个开源,一个商业收费:
开源:MySQL Workbench (具体使用介绍随着我的使用,我会慢慢总结)
商业:Navicat (收费的,有30天体验,之后我相信大家会有办法的)
至此,Linux(Ubuntu)下的MyQL安装与配置全部完毕。
Thank you for reading!
----2014.01.17 By lzq NY
bitsCN.com

MySQLviewshavelimitations:1)Theydon'tsupportallSQLoperations,restrictingdatamanipulationthroughviewswithjoinsorsubqueries.2)Theycanimpactperformance,especiallywithcomplexqueriesorlargedatasets.3)Viewsdon'tstoredata,potentiallyleadingtooutdatedinforma

ProperusermanagementinMySQLiscrucialforenhancingsecurityandensuringefficientdatabaseoperation.1)UseCREATEUSERtoaddusers,specifyingconnectionsourcewith@'localhost'or@'%'.2)GrantspecificprivilegeswithGRANT,usingleastprivilegeprincipletominimizerisks.3)

MySQLdoesn'timposeahardlimitontriggers,butpracticalfactorsdeterminetheireffectiveuse:1)Serverconfigurationimpactstriggermanagement;2)Complextriggersincreasesystemload;3)Largertablesslowtriggerperformance;4)Highconcurrencycancausetriggercontention;5)M

Yes,it'ssafetostoreBLOBdatainMySQL,butconsiderthesefactors:1)StorageSpace:BLOBscanconsumesignificantspace,potentiallyincreasingcostsandslowingperformance.2)Performance:LargerrowsizesduetoBLOBsmayslowdownqueries.3)BackupandRecovery:Theseprocessescanbe

Adding MySQL users through the PHP web interface can use MySQLi extensions. The steps are as follows: 1. Connect to the MySQL database and use the MySQLi extension. 2. Create a user, use the CREATEUSER statement, and use the PASSWORD() function to encrypt the password. 3. Prevent SQL injection and use the mysqli_real_escape_string() function to process user input. 4. Assign permissions to new users and use the GRANT statement.

MySQL'sBLOBissuitableforstoringbinarydatawithinarelationaldatabase,whileNoSQLoptionslikeMongoDB,Redis,andCassandraofferflexible,scalablesolutionsforunstructureddata.BLOBissimplerbutcanslowdownperformancewithlargedata;NoSQLprovidesbetterscalabilityand

ToaddauserinMySQL,use:CREATEUSER'username'@'host'IDENTIFIEDBY'password';Here'showtodoitsecurely:1)Choosethehostcarefullytocontrolaccess.2)SetresourcelimitswithoptionslikeMAX_QUERIES_PER_HOUR.3)Usestrong,uniquepasswords.4)EnforceSSL/TLSconnectionswith

ToavoidcommonmistakeswithstringdatatypesinMySQL,understandstringtypenuances,choosetherighttype,andmanageencodingandcollationsettingseffectively.1)UseCHARforfixed-lengthstrings,VARCHARforvariable-length,andTEXT/BLOBforlargerdata.2)Setcorrectcharacters


Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

SAP NetWeaver Server Adapter for Eclipse
Integrate Eclipse with SAP NetWeaver application server.

MinGW - Minimalist GNU for Windows
This project is in the process of being migrated to osdn.net/projects/mingw, you can continue to follow us there. MinGW: A native Windows port of the GNU Compiler Collection (GCC), freely distributable import libraries and header files for building native Windows applications; includes extensions to the MSVC runtime to support C99 functionality. All MinGW software can run on 64-bit Windows platforms.

Zend Studio 13.0.1
Powerful PHP integrated development environment

ZendStudio 13.5.1 Mac
Powerful PHP integrated development environment

mPDF
mPDF is a PHP library that can generate PDF files from UTF-8 encoded HTML. The original author, Ian Back, wrote mPDF to output PDF files "on the fly" from his website and handle different languages. It is slower than original scripts like HTML2FPDF and produces larger files when using Unicode fonts, but supports CSS styles etc. and has a lot of enhancements. Supports almost all languages, including RTL (Arabic and Hebrew) and CJK (Chinese, Japanese and Korean). Supports nested block-level elements (such as P, DIV),
