【MySQL】(1)初涉MySQL_MySQL
1. MySQL目录结构
bin:存储可执行文件
data:存储数据文件
docs:文档
include:存储包含的头文件
lib:存储库文件
share:错误消息和字符集文件
注意:这里是utf8而不是utf-8
2. 修改编码方式
一般需要修改MySQL安装目录下的my.ini配置文件中:
[mysql]
default-character-set=utf8
[mysqld]
character-set-server=utf8
3. 启动/关闭MySQL服务
(1). 可以使用windows--->服务--->MySQL服务--->启动/停止
(2). 使用命令行net start mysql启动服务、使用net stop mysql停止服务
4. 登录与退出
一些MySQL命令:
将bin路径添加到系统环境变量中,打开命令提示行:
登录:mysql -uroot -p -P3306 -h126.0.0.1,然后输入密码即可实现登录
退出:quit或者exit或者\q
5. 修改MySQL提示符
使用:mysql -uroot -proot --prompt 提示符登录后可以使用:prompt 提示符
几种可以设置的特殊提示符:
\D:完整的日期
\d:当前数据库
\h:服务器名称
\u:当前用户
6. MySQL常用命令及语法规范
SELECT VERSION(); 显示当前服务器版本
SELECT NOW(); 显示当前日期时间
SELECT USER(); 显示当前用户
(1). 关键字与函数名称全部大写
(2). 数据库名称、表名称、字段名称全部小写
(3). SQL语句必须以分号结束
7. 操作数据库
创建数据库:CREATE {DATABASE | SCHEMA} [IF NOT EXISTS] db_name [DEFAULT] CHARACTER SET [=] charset_name;查看当前服务器下的数据表列表:SHOW {DATABASES | SCHEMA} [LIKE 'pattern' | WHERE expr];
查看警告信息:SHOW WARNINGS;
查看创建信息:SHOW CREATE DATABASE db; (查看创建db数据库的语句)
使用gbk编码创建数据库:CREATE DATABASE IF NOT EXISTS db2 CHARACTER SET gbk;
修改数据库:ALTER {DATABASE | SCHEMA} [db_name] [DEFAULT] CHARACTER SET [=] charset_name;
删除数据库:DROP {DATABASE | SCHEMA} [IF EXISTS] db_name;

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

AI Hentai Generator
Generate AI Hentai for free.

Hot Article

Hot Tools

Notepad++7.3.1
Easy-to-use and free code editor

SublimeText3 Chinese version
Chinese version, very easy to use

Zend Studio 13.0.1
Powerful PHP integrated development environment

Dreamweaver CS6
Visual web development tools

SublimeText3 Mac version
God-level code editing software (SublimeText3)

Hot Topics

This article explores optimizing MySQL memory usage in Docker. It discusses monitoring techniques (Docker stats, Performance Schema, external tools) and configuration strategies. These include Docker memory limits, swapping, and cgroups, alongside

This article addresses MySQL's "unable to open shared library" error. The issue stems from MySQL's inability to locate necessary shared libraries (.so/.dll files). Solutions involve verifying library installation via the system's package m

The article discusses using MySQL's ALTER TABLE statement to modify tables, including adding/dropping columns, renaming tables/columns, and changing column data types.

This article compares installing MySQL on Linux directly versus using Podman containers, with/without phpMyAdmin. It details installation steps for each method, emphasizing Podman's advantages in isolation, portability, and reproducibility, but also

This article provides a comprehensive overview of SQLite, a self-contained, serverless relational database. It details SQLite's advantages (simplicity, portability, ease of use) and disadvantages (concurrency limitations, scalability challenges). C

This guide demonstrates installing and managing multiple MySQL versions on macOS using Homebrew. It emphasizes using Homebrew to isolate installations, preventing conflicts. The article details installation, starting/stopping services, and best pra

Article discusses configuring SSL/TLS encryption for MySQL, including certificate generation and verification. Main issue is using self-signed certificates' security implications.[Character count: 159]

Article discusses popular MySQL GUI tools like MySQL Workbench and phpMyAdmin, comparing their features and suitability for beginners and advanced users.[159 characters]
