#查看MySQL的當前用戶
mysql> SELECT USER(); +----------------+ | USER() | +----------------+ | root@localhost | +----------------+ 1 row in set (0.00 sec)
#查看所有用戶
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)
#查看當前數據庫版本,版本5.5一下默認的存儲引擎並非是InnoDB,如果需要可以手動修改。
mysql> select @@version ; +------------+ | @@version | +------------+ | 5.1.73-log | +------------+ 1 row in set (0.00 sec)
#查看數據庫是否啓用了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)
#查看當前寫入的日誌
mysql> show master status ; +----------------+----------+--------------+------------------+ |File | Position |Binlog_Do_DB | Binlog_Ignore_DB | +----------------+----------+--------------+------------------+ | log-bin.000002| 231 |test | | +----------------+----------+--------------+------------------+ 1 row in set (0.00 sec)
根據/etc/my.cnf 找到日誌的配置路徑
log-bin = /var/lib/mysql/log-bin
查看日誌內容
[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 ;
#查看默認字符集
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)
#查看某一庫的字符集
mysql> show create database test; +----------+---------------------------------------------------------------+ | Database | Create Database | +----------+---------------------------------------------------------------+ | test | CREATE DATABASE `test` /*!40100DEFAULT 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,然後重啓服務
[client] character_set_server = utf8 [mysqld] character_set_server = utf8