mysql 数据库基础笔记
mysql 数据库基础笔记,刚开始接触mysql的朋友可以参考下
进入 安装目录.../bin/mysql.execd 更换目录 dir列出当前目录所有文件
c:\vesa\...\a> 尖括号表示在c盘/的vasa/的.../的a 文件夹里面
cd空格.. 表示向上一级目录
cd空格目录名 表示进入指定目录
cd空格ted健 表示顺序查看目录名
>mysql 空格 -u用户名 -p密码 (即通过用户名 密码连数据库)
show databases; 显示所有数据库
use 数据库名; 表示进入数据库
show tables; 显示所有数据表
select * from 数据表名; 查看数据表里的数据
插入:insert into 字段名(省略不写的表示所以字段)values 值; (字段名1->值1 字段名2->值2...顺序一样个数一样)
更新:update 表名 set 字段名 = 值; (where 字段名=值 and 字段名=值)
查询:select 字段列表 from 表名;(where 字段名=值 and 字段名=值)
删除:delete from 表名;(where 字段名=值 and 字段名=值)
创建数据库:create database 数据库名;
删除列表:drop table 表名 ...;
删除数据库:drop database 数据库名;
查看表属性:describe 表名;
修改表属性:alter table 表名 modify column 字段名 类型;
修改表名:rename table 原表名 to 以后的表名;
创建数据表:create table 数据表名(项名 类型 . .,项名 类型 . .,......);

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