以下的文章主要介绍的是MySQL命令大全,其中包括MySQL数据库的常用命令,修改MySQL数据库中实际root 密码以及对grant的实际应用的介绍,下面就是文章的具体内容描述,望你会有所收获。 MySQL命令大全1、MySQL常用命令 create database name; 创建数据库 use
以下的文章主要介绍的是MySQL命令大全,其中包括MySQL数据库的常用命令,修改MySQL数据库中实际root 密码以及对grant的实际应用的介绍,下面就是文章的具体内容描述,望你会有所收获。
MySQL命令大全1、MySQL常用命令
create database name; 创建数据库
use databasename; 选择数据库
drop database name 直接删除数据库,不提醒
show tables; 显示表
describe tablename; 表的详细描述
select 中加上distinct去除重复字段
MySQLadmin drop databasename 删除数据库前,有提示。
显示当前MySQL版本和当前日期
<ol class="dp-xml"><li class="alt"><span><span>select version(),current_date; </span></span></li></ol>
MySQL命令大全2、修改MySQL中root的密码:
<ol class="dp-xml"> <li class="alt"> <span><span>shell</span><span class="tag">></span></span>MySQL<span><span> -u root -p </span></span> </li> <li>MySQL<span class="tag">></span><span> update user set </span><span class="attribute">password</span><span class="attribute-value">password</span><span>=password(”xueok654123″) where </span><span class="attribute">user</span><span>=’root’; </span> </li> </ol>
MySQL> flush privileges //刷新数据库
MySQL>use dbname; 打开数据库:
MySQL>show databases; 显示所有数据库
MySQL>show tables; 显示数据库MySQL中所有的表:先use MySQL;然后
MySQL>describe user; 显示表MySQL数据库中user表的列信息);
3、grant
创建一个可以从任何地方连接服务器的一个完全的超级用户,但是必须使用一个口令something做这个
MySQL> grant all privileges on *.* to user@localhost identified by ’something’ with
增加新用户
格式:grant select on 数据库.* to 用户名@登录主机 identified by “密码”
<ol class="dp-xml"> <li class="alt"><span><span>GRANT ALL PRIVILEGES ON *.* TO monty@localhost IDENTIFIED BY ’something’ WITH GRANT OPTION; </span></span></li> <li><span>GRANT ALL PRIVILEGES ON *.* TO monty@”%” IDENTIFIED BY ’something’ WITH GRANT OPTION; </span></li> </ol>
删除授权:
<ol class="dp-xml"> <li class="alt">MySQL<span><span class="tag">></span><span> revoke all privileges on *.* from root@”%”; </span></span> </li> <li>MySQL<span class="tag">></span><span> delete from user where </span><span class="attribute">user</span><span>=”root” and </span><span class="attribute">host</span><span>=”%”; </span> </li> <li class="alt">MySQL<span class="tag">></span><span> flush privileges; </span> </li> </ol>
创建一个用户custom在特定客户端it363.com登录,可访问特定数据库fangchandb
<ol class="dp-xml"><li class="alt">MySQL<span> </span><span>>grant select, insert, update, delete, create,drop on fangchandb.* to custom@ it363.com identified by ‘ passwd’ </span> </li></ol>
重命名表:
<ol class="dp-xml"><li class="alt">MySQL<span> </span><span>> alter table t1 rename t2; </span> </li></ol>
MySQL命令大全4、MySQLdump
备份数据库
<ol class="dp-xml"><li class="alt">shell> MySQL<span>dump -h host -u root -p dbname </span><span>>dbname_backup.sql </span> </li></ol>
恢复数据库
<ol class="dp-xml"> <li class="alt">shell> MySQLadmin -h myhost -u root -p create dbname </li> <li> <span>shell</span><span class="tag">></span><span> </span>MySQL<span>dump -h host -u root -p dbname </span><span class="tag"><span> </span><span class="tag-name">dbname_backup.sql</span><span> </span></span> </li> </ol>
如果只想卸出建表指令,则命令如下:
<ol class="dp-xml"><li class="alt">shell> MySQL<span>admin -u root -p -d databasename </span><span>> a.sql </span> </li></ol>
如果只想卸出插入数据的sql命令,而不需要建表命令,则命令如下:
<ol class="dp-xml"><li class="alt">shell> MySQL<span>admin -u root -p -t databasename </span><span>> a.sql </span> </li></ol>
那么如果我只想要数据,而不想要什么sql命令时,应该如何操作呢?
<ol class="dp-xml"><li class="alt">MySQL<span>dump -T./ phptest driver </span> </li></ol>
其中,只有指定了-T参数才可以卸出纯文本文件,表示卸出数据的目录,./表示当前目录,即与MySQLdump同一目录。如果不指定driver 表,则将卸出整个数据库的数据。每个表会生成两个文件,一个为.sql文件,包含建表执行。另一个为.txt文件,只包含数据,且没有sql指令。
5、可将查询存储在一个文件中并告诉MySQL从文件中读取查询而不是等待键盘输入。可利用外壳程序键入重定向实用程序来完成这项工作。例如,如果在文件my_file.sql 中存放有查
询,可如下执行这些查询:
例如,如果您想将建表语句提前写在sql.txt中:
<ol class="dp-xml"><li class="alt">MySQL<span> </span><span class="tag">></span><span> </span>MySQL<span> -h myhost -u root -p database </span><span class="tag"><span> </span><span>sql.txt </span></span> </li></ol>
以上的相关内容就是对MySQL命令大全的介绍,望你能有所收获。

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