常用的MySQL操作维护命令
常用的MySQL操作维护命令 1.更改口令: mysqladmin -u root -p password 新的口令 再输入老的口令 2.导出整个数据库: mysqldump -u 用户名 -p 数据库名 导出的文件名 3.导入数据库: 进入mysql数据库控制台, 如mysql -u root -p mysqluse 数据库名 mysqlso
常用的MySQL操作维护命令
1.更改口令:
mysqladmin -u root -p password 新的口令
再输入老的口令
2.导出整个数据库:
mysqldump -u 用户名 -p 数据库名 > 导出的文件名
3.导入数据库:
进入mysql数据库控制台,
如mysql -u root -p
mysql>use 数据库名
mysql>source d:test.sql
4.修复数据库:
a.修复单个库:
mysqlcheck -r -o -u root 数据库名 -p 密码
如:mysqlcheck -r -o -u root sq_test -p (root的密码)
b.修复所有库:
mysqlcheck -A -r -o -u root -p
再输入root口令
c.修复某个库里的表:
myisamchk -r -q 数据库路径 (-r -q意味着“快速恢复模式”)。
如:myisamchk -r -q /data/sq_test/*.MYI
5. 创建一个数据库及其用户
mysql4
Create DataBase 数据库名;
GRANT Select, Insert, Update, Delete, Create, Drop, INDEX, Alter ON 数据库名.* to 登录名@"%" identified by "密码";
mysql5
Create DataBase 数据库名;
GRANT Create VIEW, SHOW VIEW, Create ROUTINE, Alter ROUTINE, EXECUTE,Select, Insert, Update, Delete, Create, Drop, INDEX, Alter ON 数据库名.* to 登录名@"%" identified by "密码";
6. Innodb库转换到MyISAM库
a. 将innodb通过mysqldump 用root备份出来。
b. 用EmEditor(可能部分编码无法识别造成编码丢失,在导入到时候就会报语法错误,最好是使用UE) ,打开备份得到的文件。
用搜索-替换 功能,查找 ENGINE=InnoDB 替换为 TYPE=MyISAM 保存文件。
c. 备份使用innodb引擎的原始文件目录到其他地方,然后删除里面的所有表,以便失败后恢复。
d. 重新导入数据库。
7.关于MYSQL数据库的恢复问题:
a.如果客户使用的是DISCUZ或者PHPWIND论坛程序,无论数据库使用的是哪个版本,是MYSQL4.X还是MYSQL5.X,都可以利用论坛自带的数据库恢复工具恢复回去,不需要去考虑数据库的迁移。请记住这个可以节约很多很的时间和精力。
b.mysqldump -u 用户名 --compatible=mysql40 -p 数据库名 > 导出的文件名
c.关于MYSQL数据库导入失败的问题,修改数据库文件ENGINE=MyISAM DEFAULT CHARSET=gbk为TYPE=MyISAM,然后在导入。
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