MySQL查看当前用户、存储引擎、日志

MySQL查看当前用户、存储引擎、日志

#查看MySQL的当前用户

mysql> SELECT USER();

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

| USER()         |

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

| |

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

1 row in set (0.00 sec)

#查看所有用户

mysql> SELECT user,host,password FROM mysql.user;

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

| user    | host        | password                                  |

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

| root    | localhost   | *7AE39BE5035D5C32361400FF7DEDD757AA76896A |

| root    | 10.4.5.9    | *7AE39BE5035D5C32361400FF7DEDD757AA76896A |

| root    | 127.0.0.1   | *7AE39BE5035D5C32361400FF7DEDD757AA76896A |

| gechong | 10.4.14.168 | *11B9ACA21786F766739D0EB1483C5F64212B81AC |

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

4 rows in set (0.00 sec)

　　
 #查看当前数据库版本，版本5.5一下默认的存储引擎并非是InnoDB，如果需要可以手动修改。

 

mysql> select @@version ;

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

| @@version  |

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

| 5.1.73-log |

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

1 row in set (0.00 sec)

 
 
#查看数据库是否启用了log_bin

mysql> show variables like '%log_bin%';

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

| Variable_name                   | Value |

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

| log_bin                         | ON    |

| log_bin_trust_function_creators | OFF   |

| log_bin_trust_routine_creators  | OFF   |

| sql_log_bin                     | ON    |

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

4 rows in set (0.00 sec)

#查看当前写入的日志
 

mysql> show master status ;

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

| File           | Position | Binlog_Do_DB | Binlog_Ignore_DB |

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

| log-bin.000002 |      231 | test         |                  |

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

1 row in set (0.00 sec)

根据/etc/my.cnf 找到日志的配置路径
 
log-bin = /var/lib/mysql/log-bin

查看日志内容

[root@10-4-14-168 ~]# mysqlbinlog /var/lib/mysql/log-bin.000002

　　
 #查看MySQL支持的字符集

mysql> show character set ;

#查看默认字符集

mysql> show variables like '%char%';

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

| Variable_name            | Value                      |

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

| character_set_client     | latin1                     |

| character_set_connection | latin1                     |

| character_set_database   | utf8                       |

| character_set_filesystem | binary                     |

| character_set_results    | latin1                     |

| character_set_server     | utf8                       |

| character_set_system     | utf8                       |

| character_sets_dir       | /usr/share/mysql/charsets/ |

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

8 rows in set (0.00 sec)

#查看某一库的字符集

mysql> show create database test;

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

| Database | Create Database                                               |

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

| test     | CREATE DATABASE `test` /*!40100 DEFAULT CHARACTER SET utf8 */ |

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

1 row in set (0.00 sec)

查看某一表的字符集
 

mysql> show create table test.t1 \G

*************************** 1. row ***************************

       Table: t1

Create Table: CREATE TABLE `t1` (

  `user` char(16) CHARACTER SET utf8 COLLATE utf8_bin NOT NULL DEFAULT '',

  `host` char(60) CHARACTER SET utf8 COLLATE utf8_bin NOT NULL DEFAULT '',

  `password` char(41) CHARACTER SET latin1 COLLATE latin1_bin NOT NULL DEFAULT ''

) ENGINE=MyISAM DEFAULT CHARSET=utf8

1 row in set (0.00 sec)

#修改字符集
 
mysql>alter database mydb character set utf-8;

#可以直接在配置文件中做添加，然后重启服务

[client]

character_set_server = utf8

[mysqld]

character_set_server = utf8