MySQL中基本操作(数据库创建,修改,删除,数据表创建,修改,
今天开始,自己开始了新的领域,开始学习SQL数据库,那么就从最基本开始吧~~追赶大神脚步,今天说说数据库基本操作 数据库操作 在MySQL的DOS环境下,完成这样的动作: show databases;create database example;showdatabases;show character set;alter datab
今天开始,自己开始了新的领域,开始学习SQL数据库,那么就从最基本开始吧~~追赶大神脚步,今天说说数据库基本操作
数据库操作
在MySQL的DOS环境下,完成这样的动作:
show databases; create database example; showdatabases; show character set; alter databases example character set gbk; drop database example; show databases;
从第一句开始,到最后一句的解释
1、就是察看已存在的数据库
2、创建一个名为example的数据库
3、再次显示已存在的数据库
4、察看所有的字符集
5、将数据库example的字符集改为gbk
6、删除example数据库
7、最终显示数据库
数据表的操作
create database example;--创建example数据库 use example;--选择数据库 create table student ( id int, name varchar(20), score double );--创建一个名为student的数据表 show tables;--显示已存在数据表 alter table student add chinese double;--数据表student中增加chinese列 alter table student modify name verchar(200);--修改列 alter table student change chinese math double; desc student;--显示数据表student drop table student;--删除数据表student show tables;
这些全部就是对数据库和数据表的基本操作,实验就清楚了~~

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