C++博客-★Snowhill ★-文章分类-数据库-mysql

mysql－－备份篇

snowhill — Tue, 06 Oct 2015 16:12:00 GMT

一启用增量备份
　1.1启用binlog
binlog_format=mixed

log_bin=/data/log/bin_log.log

expire_logs_days=7

max_binlog_size =500M

binlog-do-db=db
　2 重启mysql服务
查看binlog

mysql> show binary logs;

mysql> show master status ;

mysql> show binlog events in 'bin_log.000003';

3 编写存储过程

drop procedure if exists pro_test;

CREATE DEFINER=`snowhill`@`%` PROCEDURE `pro_test`()

begin

declare i int;

set i=0;

while i<100 do

insert into T(id,name) values(i,'value');

set i=i+1;

end while;

end;

call pro_test();

select * from T;
4性能测试mysqlslap
测试500并发

mysqlslap -a -c 500 -i 10 -uroot -p123456
测试基本写入：

mysqlslap --auto-generate-sql -u root -p123456
其原理就是建一个两个字段的表，然后insert 数据测试．
use `mysqlslap`; CREATE TABLE `t1` (intcol1 INT(32) ,charcol1 VARCHAR(128))

snowhill 2015-10-07 00:12 发表评论

mysql--基本管理篇

snowhill — Tue, 06 Oct 2015 04:44:00 GMT

一　引擎管理
看你的mysql现在已提供什么存储引擎:
mysql> show engines;
看你的mysql当前默认的存储引擎:
mysql> show variables like '%storage_engine%';
查看表的存储引擎：
mysql> show create table mysql.user;

二　用户管理
建立用户：
CREATE USER 'user3' @'%' IDENTIFIED BY '123333';
grant授权也可以建立用户：
grant 权限 on 数据库.表 to '用户名'@'登录主机' [INDENTIFIED BY ‘用户密码’];
grant all on *.* to 'root'@'localhost' identified by 123456
授列级权限：

grant select(user,host,password) on mysql.user to snowhill;

mysql> select * from mysq.user;

ERROR 1142 (42000): SELECT command denied to user 'snowhill'@'localhost' for table 'user'

mysql> select user,host,password from mysql.user;

+----------+-----------+-------------------------------------------+

| user | host | password |

+----------+-----------+-------------------------------------------+

其中用户密码用的MD5加密，可以用password()函数生成你想要的密码；
修改密码：
SET PASSWORD=PASSWORD(‘新密码’);
SET PASSWORD FOR ‘用户名称’ @’主机名称’ = password(‘新密码’);
当然也可以直接update mysql.user set password=passoword('') where user='' and host='';
flush privileges
查看权限：

mysql> show grants for user;
查看列级权限：

SELECT * FROM mysql.columns_priv

①权限的层级关系，就是指权限的适用范围。

②权限的最高层级是全局级，所谓全局级就是可以在任何数据库的任何数据表上进行操作。

③数据库级：只能在某个数据库上进行操作。

④表级：权限信息所在位置：数据库: mysql ?表: tables_priv "Table privileges"

⑤列级：权限信息所在位置：数据库: mysql ?表: columns_priv "Column privileges"

⑥子程序级：权限信息所在位置：数据库: mysql ?表: procs_priv "Procedure privileges"

三　建库

mysql> create database db ;

Query OK, 1 row affected (0.00 sec)

mysql> show create database db;

+----------+---------------------------------------------------------------+

| Database | Create Database |

+----------+---------------------------------------------------------------+

| db | CREATE DATABASE `db` /*!40100 DEFAULT CHARACTER SET latin1 */ |

+----------+---------------------------------------------------------------+

1 row in set (0.00 sec)
mysql>grant all on db.* to 'snowhill'@'%';

flush PRIVILEGES;

create table T(id smallint,name varchar(32));

CREATE TABLE T_1(ID SMALLINT,NAME VARCHAR(32)) ENGINE='MYISAM';

create table t_2 (id smallint,name varchar(32)) ENGINE=innodb default charset=utf8;

查看建表语句：

mysql> show create table T;

+-------+----------------------------------------------------------------------------------------+

| Table | Create Table |

+-------+-----------------------------------------------------------------------------------------+

| T | CREATE TABLE `T` (

`id` smallint(6) DEFAULT NULL,

`name` varchar(32) DEFAULT NULL

) ENGINE=InnoDB DEFAULT CHARSET=latin1 |

+-------+------------------------------------------------------------------------------------------------+

1 row in set (0.00 sec)

mysql> show create table T_1;

+-------+-------------------------------------------------------------------------------------------------------+

| Table | Create Table |

+-------+-------------------------------------------------------------------------------------------------------+

| T_1 | CREATE TABLE `T_1` (

`ID` smallint(6) DEFAULT NULL,

`NAME` varchar(32) DEFAULT NULL

) ENGINE=MyISAM DEFAULT CHARSET=latin1 |

+-------+-------------------------------------------------------------------------------------------------------+

mysql> show create table t_2;

+-------+--------------------------------------------------------------------------------------------------------+

| Table | Create Table |

+-------+---------------------------------------------------------------------------------------------------------+

| t_2 | CREATE TABLE `t_2` (

`id` smallint(6) DEFAULT NULL,

`name` varchar(32) DEFAULT NULL

) ENGINE=InnoDB DEFAULT CHARSET=utf8 |

mysql> show table status from db;
Mysql里的引擎是可以改的，更改语句如下：

mysql> alter table T_1 engine=innodb;

Query OK, 0 rows affected (0.02 sec)

snowhill 2015-10-06 12:44 发表评论

mysql windows 安装

snowhill — Fri, 23 Aug 2013 09:06:00 GMT

一　安装数据库服务
mysqld --install mysqlxy
二　启动数据库
net start mysqlxy
三　查询版本号

mysql> select version();
+------------------+
| version() |
+------------------+
| 5.1.71-community |
+------------------+
1 row in set (0.05 sec)

mysql> create database tytx character set gbk;
Query OK, 1 row affected (0.01 sec)

mysql> grant all on tytx.* to tytx@localhost identified by 'mysql';
Query OK, 0 rows affected (0.05 sec)
mysql> show create table student;
------------------------------------------------------------------------------+
| Table | Create Table
------------------------------------------------------------------------------+
| student | CREATE TABLE `student` (
`id` int(11) DEFAULT NULL,
`name` char(12) DEFAULT NULL,
`class` char(10) DEFAULT NULL,
`grade` char(2) DEFAULT NULL
) ENGINE=InnoDB DEFAULT CHARSET=gbk |
+---------+-------------------------------------------------------------------------
这里可以看出所用的数据库引擎和字符集编码。
--查看表的状态
mysql> show table status from tytx where name='STUDENT';
六　备份
D:\>mysqldump -utytx -pmysql tytx >d:\mysql_2.dmp
这样备出来的是一个文本文件。可以压缩一下。

@echo on
cd d:\mysql\dmp\
del 15.sql.gz
move 14.sql.gz 15.sql.gz
move 13.sql.gz 14.sql.gz
move 12.sql.gz 13.sql.gz
move 11.sql.gz 12.sql.gz
move 10.sql.gz 11.sql.gz
move 9.sql.gz 10.sql.gz
move 8.sql.gz 9.sql.gz
move 7.sql.gz 8.sql.gz
move 6.sql.gz 7.sql.gz
move 5.sql.gz 6.sql.gz
move 4.sql.gz 5.sql.gz
move 3.sql.gz 4.sql.gz
move 2.sql.gz 3.sql.gz
move 1.sql.gz 2.sql.gz
set v_time=%date:~0,10%
set v_file=d:\mysqldmp\
mysqldump -utytx -pmysql tytx|gzip >1.sql.gz

还原
gunzip < 1.sql.gz | mysql -uusername -ppassword databasename

snowhill 2013-08-23 17:06 发表评论