总览show 语句
show tables from database_name; -- 显示当前数据库中所有表的名称。 show databases; -- 显示mysql中所有数据库的名称。 show columns from database_name.table_name; -- 显示表中列名称。 show grants for user_name; -- 显示一个用户的权限，显示结果类似于grant 命令。 show index from table_name; -- 显示表的索引。 show status; -- 显示一些系统特定资源的信息，例如，正在运行的线程数量。 show variables; -- 显示系统变量的名称和值。 show processlist; -- 显示系统中正在运行的所有进程，也就是当前正在执行的查询。大多数用户可以查看他们自己的进程，但是如果他们拥有process权限，就可以查看所有人的进程，包括密码。 show table status; -- 显示当前使用或者指定的database中的每个表的信息。信息包括表类型和表的最新更新时间。 show privileges; -- 显示服务器所支持的不同权限。 show create database database_name; -- 显示create database 语句是否能够创建指定的数据库。 show create table table_name; -- 显示create database 语句是否能够创建指定的数据库。 show engines; -- 显示安装以后可用的存储引擎和默认引擎。 show innodb status; -- 显示innoDB存储引擎的状态。 show logs; -- 显示BDB存储引擎的日志。 show warnings; -- 显示最后一个执行的语句所产生的错误、警告和通知。 show errors; -- 只显示最后一个执行语句所产生的错误。 show [storage] engines; --显示安装后的可用存储引擎和默认引擎。
查看进程
show processlist;
查看目录配置
show variables like '%dir%'; +-----------------------------------------+----------------------------+ | Variable_name | Value | +-----------------------------------------+----------------------------+ | basedir | /usr/ | | binlog_direct_non_transactional_updates | OFF | | character_sets_dir | /usr/share/mysql/charsets/ | | datadir | /var/lib/mysql/ | | ignore_db_dirs | | | innodb_data_home_dir | | | innodb_log_group_home_dir | ./ | | innodb_max_dirty_pages_pct | 75 | | innodb_max_dirty_pages_pct_lwm | 0 | | innodb_tmpdir | | | innodb_undo_directory | . | | lc_messages_dir | /usr/share/mysql/ | | plugin_dir | /usr/lib64/mysql/plugin/ | | slave_load_tmpdir | /tmp | | tmpdir | /tmp | +-----------------------------------------+----------------------------+ 15 rows in set (0.00 sec)
查看字符集配置
mysql> show variables like 'char%'; +--------------------------+----------------------------+ | Variable_name | Value | +--------------------------+----------------------------+ | character_set_client | utf8 | | character_set_connection | utf8 | | character_set_database | utf8 | | character_set_filesystem | binary | | character_set_results | utf8 | | character_set_server | utf8 | | character_set_system | utf8 | | character_sets_dir | /usr/share/mysql/charsets/ | +--------------------------+----------------------------+ 8 rows in set (0.00 sec)
查看可分配的权限
mysql> show privileges; +-------------------------+---------------------------------------+-------------------------------------------------------+ | Privilege | Context | Comment | +-------------------------+---------------------------------------+-------------------------------------------------------+ | Alter | Tables | To alter the table | | Alter routine | Functions,Procedures | To alter or drop stored functions/procedures | | Create | Databases,Tables,Indexes | To create new databases and tables | | Create routine | Databases | To use CREATE FUNCTION/PROCEDURE | | Create temporary tables | Databases | To use CREATE TEMPORARY TABLE | | Create view | Tables | To create new views | | Create user | Server Admin | To create new users | | Delete | Tables | To delete existing rows | | Drop | Databases,Tables | To drop databases, tables, and views | | Event | Server Admin | To create, alter, drop and execute events | | Execute | Functions,Procedures | To execute stored routines | | File | File access on server | To read and write files on the server | | Grant option | Databases,Tables,Functions,Procedures | To give to other users those privileges you possess | | Index | Tables | To create or drop indexes | | Insert | Tables | To insert data into tables | | Lock tables | Databases | To use LOCK TABLES (together with SELECT privilege) | | Process | Server Admin | To view the plain text of currently executing queries | | Proxy | Server Admin | To make proxy user possible | | References | Databases,Tables | To have references on tables | | Reload | Server Admin | To reload or refresh tables, logs and privileges | | Replication client | Server Admin | To ask where the slave or master servers are | | Replication slave | Server Admin | To read binary log events from the master | | Select | Tables | To retrieve rows from table | | Show databases | Server Admin | To see all databases with SHOW DATABASES | | Show view | Tables | To see views with SHOW CREATE VIEW | | Shutdown | Server Admin | To shut down the server | | Super | Server Admin | To use KILL thread, SET GLOBAL, CHANGE MASTER, etc. | | Trigger | Tables | To use triggers | | Create tablespace | Server Admin | To create/alter/drop tablespaces | | Update | Tables | To update existing rows | | Usage | Server Admin | No privileges - allow connect only | +-------------------------+---------------------------------------+-------------------------------------------------------+ 31 rows in set (0.00 sec)
Log_Error
mysql> show variables like '%log_error%'; +---------------------+---------------------+ | Variable_name | Value | +---------------------+---------------------+ | binlog_error_action | IGNORE_ERROR | | log_error | /var/log/mysqld.log | +---------------------+---------------------+ 2 rows in set (0.00 sec)
Show Grants
mysql> show grants for 'root'@'bogon'; +------------------------------------------------------------------------------------------------------------------------------------+ | Grants for root@bogon | +------------------------------------------------------------------------------------------------------------------------------------+ | GRANT ALL PRIVILEGES ON *.* TO 'root'@'bogon' IDENTIFIED BY PASSWORD '*81F5E21E35407D884A6CD4A731AEBFB6AF209E1B' WITH GRANT OPTION | | GRANT PROXY ON ''@'' TO 'root'@'bogon' WITH GRANT OPTION | +------------------------------------------------------------------------------------------------------------------------------------+ 2 rows in set (0.00 sec)