数据库的一些常用操作_MySQL
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注意:创建数据库之前要先连接Mysql服务器
-创建数据库: create database db_name[数据库选项]; 如:create database `java`;
-查询当前存在的数据库(即显示当前服务器中所有的数据库):show databases;
-查询数据库的创建语句:show create database db_name;
-删除数据库:drop database db_name;(不可逆,慎用)
-修改数据库的属性:alter database db_name 修改指令指令就是数据库属性的修改即修改数据库的属性文件db.opt
-修改数据库名:
第一种快捷方式,直接在系统(数据库所在的文件夹里)里将数据库目录的名字改掉(但是不通用)
第二种方式:将数据库的内容全部导出(备份),新建一个数据库将内容导入,再删除旧的数据库或者先建一个新的数据库,将旧的数据库里的表移动到新的数据库里,之后再删除旧的数据库。
第三种方式:新建一个数据库,将旧数据库里的表都rename到新数据库里,将旧数据库删掉
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