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)
年岁有加，并非垂老，理想丢弃，方堕暮年。
