mysql常用show语句
2016-07-12 17:39
363 查看
1. show
character set [like 'pattern']
显示所有可利用的字符集
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 | mysql> show character set like 'gbk' -> ; +---------+------------------------+-------------------+--------+ | Charset | Description | Default collation | Maxlen | +---------+------------------------+-------------------+--------+ | gbk | GBK Simplified Chinese | gbk_chinese_ci | 2 | +---------+------------------------+-------------------+--------+ 1 row in set (0.00 sec) mysql> show character set like 'utf%'; +---------+---------------+-------------------+--------+ | Charset | Description | Default collation | Maxlen | +---------+---------------+-------------------+--------+ | utf8 | UTF-8 Unicode | utf8_general_ci | 3 | +---------+---------------+-------------------+--------+ 1 row in set (0.00 sec) |
2.SHOW [FULL]
COLUMNS {FROM | IN} tbl_name [{FROM | IN} db_name] [LIKE 'pattern']
用于显示所给表的列。这里感觉跟desc tbl_name的功能相同。
查询django数据库auth_group表结构
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 | mysql> show columns from auth_group from django; +-------+-------------+------+-----+---------+----------------+ | Field | Type | Null | Key | Default | Extra | +-------+-------------+------+-----+---------+----------------+ | id | int(11) | | PRI | NULL | auto_increment | | name | varchar(80) | | UNI | | | +-------+-------------+------+-----+---------+----------------+ 2 rows in set (0.00 sec) mysql> show columns from django.auth_group; +-------+-------------+------+-----+---------+----------------+ | Field | Type | Null | Key | Default | Extra | +-------+-------------+------+-----+---------+----------------+ | id | int(11) | | PRI | NULL | auto_increment | | name | varchar(80) | | UNI | | | +-------+-------------+------+-----+---------+----------------+ 2 rows in set (0.00 sec) mysql> desc django.auth_group; +-------+-------------+------+-----+---------+----------------+ | Field | Type | Null | Key | Default | Extra | +-------+-------------+------+-----+---------+----------------+ | id | int(11) | | PRI | NULL | auto_increment | | name | varchar(80) | | UNI | | | +-------+-------------+------+-----+---------+----------------+ 2 rows in set (0.00 sec) |
3.show create
table tbl_name
显示创建表的sql语句。
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 | mysql> show create table auth_group; +------------+------------------------------------------------------------------ -------------------------------------------------------------------------------- ------------------------------------------------------+ | Table | Create Table | +------------+------------------------------------------------------------------ -------------------------------------------------------------------------------- ------------------------------------------------------+ | auth_group | CREATE TABLE `auth_group` ( `id` int(11) NOT NULL auto_increment, `name` varchar(80) NOT NULL default '', PRIMARY KEY (`id`), UNIQUE KEY `name` (`name`) ) ENGINE=InnoDB DEFAULT CHARSET=utf8 | +------------+------------------------------------------------------------------ -------------------------------------------------------------------------------- ------------------------------------------------------+ 1 row in set (0.00 sec) |
显示创建db_name时候的sql语句
5。show databases [like 'pattern']
显示当前mysql上所有的数据库
1 2 3 4 5 6 7 8 9 10 | mysql> show databases; +----------+ | Database | +----------+ | django | | mysql | | test | | trac | +----------+ 4 rows in set (0.00 sec) |
6。show tables [like 'pattern']
显示当前数据库上的所有表
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 | mysql> show tables; +----------------------------+ | Tables_in_django | +----------------------------+ | auth_group | | auth_group_permissions | | auth_message | | auth_permission | | auth_user | | auth_user_groups | | auth_user_user_permissions | | django_content_type | | django_session | | django_site | | polls_choice | | polls_poll | +----------------------------+ 12 rows in set (0.00 sec) |
7.show grants
[for user]
显示对user的授权语句
1 2 3 4 5 6 7 8 9 10 11 12 | mysql> show grants; +------------------------------------------------------------------------------- ---------------------------------------------------------+ | Grants for root@localhost | +------------------------------------------------------------------------------- ---------------------------------------------------------+ | GRANT ALL PRIVILEGES ON *.* TO 'root'@'localhost' IDENTIFIED BY PASSWORD '*A4B 6157319038724E35608' WITH GRANT OPTION | +------------------------------------------------------------------------------- ---------------------------------------------------------+ 1 row in set (0.00 sec) |
8.SHOW {INDEX | INDEXES | KEYS} {FROM | IN} tbl_name [{FROM | IN} db_name]
显示索引
1 2 3 4 5 6 7 8 9 10 11 12 13 14 | mysql> show index from auth_group; +------------+------------+----------+--------------+-------------+-----------+- ------------+----------+--------+------+------------+---------+ | Table | Non_unique | Key_name | Seq_in_index | Column_name | Collation | Cardinality | Sub_part | Packed | Null | Index_type | Comment | +------------+------------+----------+--------------+-------------+-----------+- ------------+----------+--------+------+------------+---------+ | auth_group | 0 | PRIMARY | 1 | id | A | 0 | NULL | NULL | | BTREE | | | auth_group | 0 | name | 1 | name | A | 0 | NULL | NULL | | BTREE | | +------------+------------+----------+--------------+-------------+-----------+- ------------+----------+--------+------+------------+---------+ 2 rows in set (0.00 sec) |
9。show open table
显示当前表缓冲区中的表
1 2 3 4 5 6 7 | mysql> show open tables; +----------+------------+--------+-------------+ | Database | Table | In_use | Name_locked | +----------+------------+--------+-------------+ | django | auth_group | 0 | 0 | +----------+------------+--------+-------------+ 1 row in set (0.00 sec) |
10。SHOW PRIVILEGES
显示mysql所支持的权限
11。SHOW [FULL] PROCESSLIST
显示正在使用的线程(thread)
1 2 3 4 5 6 7 8 9 10 11 12 | mysql> show processlist; +----+------+----------------+--------+---------+------+-------+---------------- --+ | Id | User | Host | db | Command | Time | State | Info | +----+------+----------------+--------+---------+------+-------+---------------- --+ | 7 | root | localhost:1158 | django | Query | 0 | NULL | show processlis t | +----+------+----------------+--------+---------+------+-------+---------------- --+ 1 row in set (0.00 sec) |
| SESSION] VARIABLES [LIKE 'pattern']
显示变量
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 | mysql> show variables like "%char%"; +--------------------------+---------------------------------------------------- -----+ | Variable_name | Value | +--------------------------+---------------------------------------------------- -----+ | character_set_client | latin1 | | character_set_connection | latin1 | | character_set_database | utf8 | | character_set_results | latin1 | | character_set_server | utf8 | | character_set_system | utf8 | | character_sets_dir | D:\Program Files\MySQL\MySQL Server 4.1\share\chars ets/ | +--------------------------+---------------------------------------------------- -----+ 7 rows in set (0.00 sec) |
SHOW COUNT(*) WARNINGS
显示当前session中最后的语句生产成的错误,警告灯信息
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