MySQL问题集锦

 

一、下载(免安装Archive版)

   下载地址：http://dev.mysql.com/downloads/mysql/

    

 

二、安装

1.解压到目录：D:\mysql-5.1.59-winx64

2.注册mysql服务，命令行跳转到D:\mysql-5.1.59-winx64\bin，执行以下命令：

D:\mysql-5.1.59-winx64\bin>mysqld install mysql
Service successfully installed.

3.移除mysql服务，命令行跳转到D:\mysql-5.1.59-winx64\bin，执行以下命令：

D:\mysql-5.1.59-winx64\bin>mysqld remove mysql
Service successfully removed.

 

4.启动停止mysql服务

    启动：

C:\>net start mysql
MySQL 服务正在启动 ..
MySQL 服务已经启动成功。

 

    停止：

C:\>net stop mysql
MySQL 服务正在停止...
MySQL 服务已成功停止。

 

5.设置服务自动启动

D:\>sc config mysql start= auto
[SC] ChangeServiceConfig 成功

注：start与=号之间不能有空格，=号与auto之间必须有一个空格 

 

三.、配置

在D:\mysql-5.1.59-winx64目录下,有5个配置文件模板, 分别为：

        my-small.ini、

        my-medium.ini、

        my-large.ini、

        my-huge.ini、

        my-innodb-heavy-4G.ini

1.我们选择my-innodb-heavy-4G.ini,作为配置模板

2.将其改名为：my.ini

3.修改默认引擎：找到default-storage-engine = MYISAM 这段,将其改为default-storage-engine = INNODB

4.修改默认引擎为INNODB后，可能导致服务器启动失败：删除在MySQL安装目录下的Data目录中的ib_logfile0，ib_logfile1，ibdata1三个文件，重新启动即可

5.修改默认编码：

          打开my.ini文件

          [client] 段添加：  default-character-set=utf8

          [mysqld]段添加：character-set-server=utf8

[client]
port		= 3306
socket		= MySQL
default-character-set=utf8

[mysqld]
port		= 3306
socket		= MySQL
character-set-server=utf8

 

         

 

 

四、常用命令

1.命令行登陆：mysql -uroot -proot

D:\mysql-5.1.59-winx64\bin>mysql -uroot -proot
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 3
Server version: 5.1.59-community-log MySQL Community Server (GPL)

Copyright (c) 2000, 2011, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

mysql>

 

2.查看数据库 show databases;

mysql> show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| mysql              |
| test               |
+--------------------+
3 rows in set (0.00 sec)

 

2.查看数据库表 use dbname; show tables;

mysql> use mysql;
Database changed
mysql> show tables;
+---------------------------+
| Tables_in_mysql           |
+---------------------------+
| columns_priv              |
| db                        |
| event                     |
| func                      |
| general_log               |
| help_category             |
| help_keyword              |
| help_relation             |
| help_topic                |
| host                      |
| ndb_binlog_index          |
| plugin                    |
| proc                      |
| procs_priv                |
| servers                   |
| slow_log                  |
| tables_priv               |
| time_zone                 |
| time_zone_leap_second     |
| time_zone_name            |
| time_zone_transition      |
| time_zone_transition_type |
| user                      |
+---------------------------+
23 rows in set (0.03 sec)

 

3.查看数据配置变量信息 show variables;

 

mysql> show variables like '%innodb%';
+-----------------------------------------+------------------------+
| Variable_name                           | Value                  |
+-----------------------------------------+------------------------+
| have_innodb                             | YES                    |
| ignore_builtin_innodb                   | OFF                    |
| innodb_adaptive_hash_index              | ON                     |
| innodb_additional_mem_pool_size         | 16777216               |
| innodb_autoextend_increment             | 8                      |
| innodb_autoinc_lock_mode                | 1                      |
| innodb_buffer_pool_size                 | 2147483648             |
| innodb_checksums                        | ON                     |
| innodb_commit_concurrency               | 0                      |
| innodb_concurrency_tickets              | 500                    |
| innodb_data_file_path                   | ibdata1:10M:autoextend |
| innodb_data_home_dir                    |                        |
| innodb_doublewrite                      | ON                     |
| innodb_fast_shutdown                    | 1                      |
| innodb_file_io_threads                  | 4                      |
| innodb_file_per_table                   | OFF                    |
| innodb_flush_log_at_trx_commit          | 1                      |
| innodb_flush_method                     |                        |
| innodb_force_recovery                   | 0                      |
| innodb_lock_wait_timeout                | 120                    |
| innodb_locks_unsafe_for_binlog          | OFF                    |
| innodb_log_buffer_size                  | 8388608                |
| innodb_log_file_size                    | 268435456              |
| innodb_log_files_in_group               | 3                      |
| innodb_log_group_home_dir               | .\                     |
| innodb_max_dirty_pages_pct              | 90                     |
| innodb_max_purge_lag                    | 0                      |
| innodb_mirrored_log_groups              | 1                      |
| innodb_open_files                       | 300                    |
| innodb_rollback_on_timeout              | OFF                    |
| innodb_stats_method                     | nulls_equal            |
| innodb_stats_on_metadata                | ON                     |
| innodb_support_xa                       | ON                     |
| innodb_sync_spin_loops                  | 20                     |
| innodb_table_locks                      | ON                     |
| innodb_thread_concurrency               | 16                     |
| innodb_thread_sleep_delay               | 10000                  |
| innodb_use_legacy_cardinality_algorithm | ON                     |
+-----------------------------------------+------------------------+
38 rows in set (0.00 sec)

 参考：http://dev.mysql.com/doc/refman/5.0/en/show-variables.html

            http://dev.mysql.com/doc/refman/5.6/en/server-system-variables.html

 

4.修改用户密码

   方法1：mysqladmin命令(注：USER为用户名，PASSWORD为新密码)

mysqladmin -u USER -p password PASSWORD

 

   方法2：UPDATE user语句(注：必须现用root帐户登入mysql)

UPDATE user SET password=PASSWORD('123456') WHERE user='root';
 FLUSH PRIVILEGES;

 

   方法3：SET PASSWORD语句(注：必须现用root帐户登入mysql)

SET PASSWORD FOR root=PASSWORD('123456');

 5.授权-允许其他机器连接数据库

mysql> grant all on *.* to root@'%' identified by 'root';
Query OK, 0 rows affected (0.00 sec)

 

待续。。。