MySQL mysqlshow 명령어

mysqlshow 명령어

mysqlshow 명령어는 MySQL 데이터베이스 서버에 대한 정보를 표시하는 데 사용됩니다.

 

mysqlshow 명령어는 다음과 같은 다양한 정보를 표시할 수 있습니다.

 

• 데이터베이스 목록
• 테이블 목록
• 열 목록
• 인덱스 목록
• 사용자 목록
• 권한 목록
• 기타 정보

mysqlshow 명령어는 MySQL 데이터베이스 서버에 대한 정보를 확인하거나, 데이터베이스 관리를 위해 사용됩니다.

 

mysqlshow 명령어의 사용법은 다음과 같습니다.

mysqlshow [option] [database_name.table_name]

옵션은 다음과 같습니다.

 

• databases: 데이터베이스 목록을 표시합니다.
• tables: 테이블 목록을 표시합니다.
• columns: 열 목록을 표시합니다.
• indexes: 인덱스 목록을 표시합니다.
• users: 사용자 목록을 표시합니다.
• privileges: 권한 목록을 표시합니다.

예를 들어

데이터베이스 목록을 표시하려면 다음과 같이 명령어를 실행합니다.

mysqlshow databases;

테이블 목록을 표시하려면 다음과 같이 명령어를 실행합니다.

mysqlshow tables;

열 목록을 표시하려면 다음과 같이 명령어를 실행합니다.

mysqlshow columns FROM table_name;

인덱스 목록을 표시하려면 다음과 같이 명령어를 실행합니다.

mysqlshow indexes FROM table_name;

사용자 목록을 표시하려면 다음과 같이 명령어를 실행합니다.

mysqlshow users;

권한 목록을 표시하려면 다음과 같이 명령어를 실행합니다.

SHOW privileges;

mysqlshow 명령어는 MySQL 데이터베이스 서버에 대한 정보를 확인하거나, 데이터베이스 관리를 위해 유용한 명령어입니다.

 

데이터베이스, 테이블 및 열 정보 표시

mysqlshow [options] [db_name [tbl_name [col_name]]]

database 출력

mysqlshow -u root -p

$ mysqlshow -u root -p
Enter password:
+--------------------+
|     Databases      |
+--------------------+
| information_schema |
| mysql              |
| performance_schema |
| racktables_db      |
| sys                |
| zabbix_db          |
+--------------------+

mysql(database)의 table 출력

mysqlshow -u root -p mysql

$ mysqlshow -u root -p mysql
Enter password:
Database: mysql
+---------------------------+
|          Tables           |
+---------------------------+
| columns_priv              |
| db                        |
| engine_cost               |
| event                     |
| func                      |
| general_log               |
| gtid_executed             |
| help_category             |
| help_keyword              |
| help_relation             |
| help_topic                |
| innodb_index_stats        |
| innodb_table_stats        |
| ndb_binlog_index          |
| plugin                    |
| proc                      |
| procs_priv                |
| proxies_priv              |
| server_cost               |
| servers                   |
| slave_master_info         |
| slave_relay_log_info      |
| slave_worker_info         |
| slow_log                  |
| tables_priv               |
| time_zone                 |
| time_zone_leap_second     |
| time_zone_name            |
| time_zone_transition      |
| time_zone_transition_type |
| user                      |
+---------------------------+

servers(table)의 컬럼(columns) 출력

mysqlshow -u root -p mysql servers

$ mysqlshow -u root -p mysql servers
Enter password:
Database: mysql  Table: servers
+-------------+----------+-----------------+------+-----+---------+-------+---------------------------------+---------+
| Field       | Type     | Collation       | Null | Key | Default | Extra | Privileges                      | Comment |
+-------------+----------+-----------------+------+-----+---------+-------+---------------------------------+---------+
| Server_name | char(64) | utf8_general_ci | NO   | PRI |         |       | select,insert,update,references |         |
| Host        | char(64) | utf8_general_ci | NO   |     |         |       | select,insert,update,references |         |
| Db          | char(64) | utf8_general_ci | NO   |     |         |       | select,insert,update,references |         |
| Username    | char(64) | utf8_general_ci | NO   |     |         |       | select,insert,update,references |         |
| Password    | char(64) | utf8_general_ci | NO   |     |         |       | select,insert,update,references |         |
| Port        | int(4)   |                 | NO   |     | 0       |       | select,insert,update,references |         |
| Socket      | char(64) | utf8_general_ci | NO   |     |         |       | select,insert,update,references |         |
| Wrapper     | char(64) | utf8_general_ci | NO   |     |         |       | select,insert,update,references |         |
| Owner       | char(64) | utf8_general_ci | NO   |     |         |       | select,insert,update,references |         |
+-------------+----------+-----------------+------+-----+---------+-------+---------------------------------+---------+

servers(table)의 하나의 컬럼(columns)만 출력

mysqlshow -u root -p mysql servers Host

$ mysqlshow -u root -p mysql servers Host
Enter password:
Database: mysql  Table: servers  Wildcard: Host
+-------+----------+-----------------+------+-----+---------+-------+---------------------------------+---------+
| Field | Type     | Collation       | Null | Key | Default | Extra | Privileges                      | Comment |
+-------+----------+-----------------+------+-----+---------+-------+---------------------------------+---------+
| Host  | char(64) | utf8_general_ci | NO   |     |         |       | select,insert,update,references |         |
+-------+----------+-----------------+------+-----+---------+-------+---------------------------------+---------+

mysqlshow [options]

--help, -?
Display a help message and exit.

--bind-address=ip_address
On a computer having multiple network interfaces, use this option to select which interface to use for connecting to the MySQL server.

--character-sets-dir=dir_name
The directory where character sets are installed. See Section 10.5, “Character Set Configuration”.

--compress, -C
Compress all information sent between the client and the server if both support compression.

--count
Show the number of rows per table. This can be slow for non-MyISAM tables.

--debug[=debug_options], -# [debug_options]
Write a debugging log. A typical debug_options string is d:t:o,file_name. The default is d:t:o.

--debug-check
Print some debugging information when the program exits.

--debug-info
Print debugging information and memory and CPU usage statistics when the program exits.

--default-character-set=charset_name
Use charset_name as the default character set. See Section 10.5, “Character Set Configuration”.

--default-auth=plugin
A hint about the client-side authentication plugin to use. See Section 6.3.8, “Pluggable Authentication”.

--defaults-extra-file=file_name
Read this option file after the global option file but (on Unix) before the user option file. If the file does not exist or is otherwise
inaccessible, an error occurs.  file_name is interpreted relative to the current directory if given as a relative path name rather than a
full path name.

--defaults-file=file_name
Use only the given option file. If the file does not exist or is otherwise inaccessible, an error occurs.  file_name is interpreted relative
to the current directory if given as a relative path name rather than a full path name.
Exception: Even with --defaults-file, client programs read .mylogin.cnf.

--defaults-group-suffix=str
Read not only the usual option groups, but also groups with the usual names and a suffix of str. For example, mysqlshow normally reads the
[client] and [mysqlshow] groups. If the --defaults-group-suffix=_other option is given, mysqlshow also reads the [client_other] and
[mysqlshow_other] groups.

--enable-cleartext-plugin
Enable the mysql_clear_password cleartext authentication plugin. (See Section 6.5.1.5, “Client-Side Cleartext Pluggable Authentication”.)
This option was added in MySQL 5.7.10.

--host=host_name, -h host_name
Connect to the MySQL server on the given host.

--keys, -k
Show table indexes.

--login-path=name
Read options from the named login path in the .mylogin.cnf login path file. A “login path” is an option group containing options that specify
which MySQL server to connect to and which account to authenticate as. To create or modify a login path file, use the mysql_config_editor
utility. See mysql_config_editor(1).

--no-defaults
Do not read any option files. If program startup fails due to reading unknown options from an option file, --no-defaults can be used to
prevent them from being read.
The exception is that the .mylogin.cnf file, if it exists, is read in all cases. This permits passwords to be specified in a safer way than
on the command line even when --no-defaults is used. (.mylogin.cnf is created by the mysql_config_editor utility. See
mysql_config_editor(1).)

--password[=password], -p[password]
The password to use when connecting to the server. If you use the short option form (-p), you cannot have a space between the option and the
password. If you omit the password value following the --password or -p option on the command line, mysqlshow prompts for one.
Specifying a password on the command line should be considered insecure. See Section 6.1.2.1, “End-User Guidelines for Password Security”.
You can use an option file to avoid giving the password on the command line.

--pipe, -W
On Windows, connect to the server using a named pipe. This option applies only if the server supports named-pipe connections.

--plugin-dir=dir_name
The directory in which to look for plugins. Specify this option if the --default-auth option is used to specify an authentication plugin but
mysqlshow does not find it. See Section 6.3.8, “Pluggable Authentication”.

--port=port_num, -P port_num
The TCP/IP port number to use for the connection.

--print-defaults
Print the program name and all options that it gets from option files.

--protocol={TCP|SOCKET|PIPE|MEMORY}
The connection protocol to use for connecting to the server. It is useful when the other connection parameters normally would cause a
protocol to be used other than the one you want. For details on the permissible values, see Section 4.2.2, “Connecting to the MySQL Server”.

--secure-auth
Do not send passwords to the server in old (pre-4.1) format. This prevents connections except for servers that use the newer password format.
This option was added in MySQL 5.7.4.
As of MySQL 5.7.5, this option is deprecated and will be removed in a future MySQL release. It is always enabled and attempting to disable it
(--skip-secure-auth, --secure-auth=0) produces an error. Before MySQL 5.7.5, this option is enabled by default but can be disabled.

    Note
    Passwords that use the pre-4.1 hashing method are less secure than passwords that use the native password hashing method and should be
    avoided. Pre-4.1 passwords are deprecated and support for them is removed in MySQL 5.7.5. For account upgrade instructions, see
    Section 6.5.1.3, “Migrating Away from Pre-4.1 Password Hashing and the mysql_old_password Plugin”.

--shared-memory-base-name=name
On Windows, the shared-memory name to use, for connections made using shared memory to a local server. The default value is MYSQL. The
shared-memory name is case sensitive.
The server must be started with the --shared-memory option to enable shared-memory connections.

--show-table-type, -t
Show a column indicating the table type, as in SHOW FULL TABLES. The type is BASE TABLE or VIEW.

--socket=path, -S path
For connections to localhost, the Unix socket file to use, or, on Windows, the name of the named pipe to use.

--ssl*
Options that begin with --ssl specify whether to connect to the server using SSL and indicate where to find SSL keys and certificates. See
Section 6.4.5, “Command Options for Secure Connections”.

--status, -i
Display extra information about each table.

--tls-version=protocol_list
The protocols permitted by the client for encrypted connections. The value is a comma-separated list containing one or more protocol names.
The protocols that can be named for this option depend on the SSL library used to compile MySQL. For details, see Section 6.4.3, “Secure
Connection Protocols and Ciphers”.
This option was added in MySQL 5.7.10.

--user=user_name, -u user_name
The MySQL user name to use when connecting to the server.

--verbose, -v
Verbose mode. Print more information about what the program does. This option can be used multiple times to increase the amount of
information.

--version, -V
Display version information and exit.