Mysql的管理

Linux系統中：mysql進入的命令為mysql -u root -p +你的mysql密碼。

Mysql是如何添加用戶呢？

在mysql命令行下，使用use mysql;進入mysql的資料庫中。然後插入信息到user表，就可以添加上用戶了。

例子如下：

MariaDB [mysql]> insert into user  (host,user,password,select_priv,insert_priv,update_priv) values ('localhost','whr',password('whr123'),'Y','Y','Y');
Query OK, 1 row affected, 4 warnings (0.00 sec)
MariaDB [mysql]> select host,user,password from user;

常用的管理Mysql的命令：
use 資料庫；（進入資料庫）

MariaDB [(none)]> use mysql;
Database changed
show databases;（查看MySQL中的所有資料庫）

MariaDB [(none)]> show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| mysql              |
| performance_schema |
| test               |
+--------------------+
4 rows in set (0.01 sec)
show tables;（查看當前資料庫中的所有表）
MariaDB [mysql]> show tables ;
+---------------------------+
| Tables_in_mysql           |
+---------------------------+
| columns_priv              |
| db                        |
| event                     |
| func                      |
| general_log               |
| help_category             |
| help_keyword              |
| help_relation             |
| help_topic                |
| host                      |
| ndb_binlog_index          |
| plugin                    |
| proc                      |
| procs_priv                |
| proxies_priv              |
| servers                   |
| slow_log                  |
| tables_priv               |
| time_zone                 |
| time_zone_leap_second     |
| time_zone_name            |
| time_zone_transition      |
| time_zone_transition_type |
| user                      |
+---------------------------+
24 rows in set (0.00 sec)

show columnns form 表名;（顯示指定表的屬性）
MariaDB [mysql]> show columns from servers;
+-------------+----------+------+-----+---------+-------+
| Field       | Type     | Null | Key | Default | Extra |
+-------------+----------+------+-----+---------+-------+
| Server_name | char(64) | NO   | PRI |         |       |
| Host        | char(64) | NO   |     |         |       |
| Db          | char(64) | NO   |     |         |       |
| Username    | char(64) | NO   |     |         |       |
| Password    | char(64) | NO   |     |         |       |
| Port        | int(4)   | NO   |     | 0       |       |
| Socket      | char(64) | NO   |     |         |       |
| Wrapper     | char(64) | NO   |     |         |       |
| Owner       | char(64) | NO   |     |         |       |
+-------------+----------+------+-----+---------+-------+
9 rows in set (0.00 sec)

show index from 表名;（顯示指定表的詳細索引信息，包括主鍵）
MariaDB [mysql]> show index from user;
+-------+------------+----------+--------------+-------------+-----------+-------------+----------+--------+------+------------+---------+---------------+
| Table | Non_unique | Key_name | Seq_in_index | Column_name | Collation | Cardinality | Sub_part | Packed | Null | Index_type | Comment | Index_comment |
+-------+------------+----------+--------------+-------------+-----------+-------------+----------+--------+------+------------+---------+---------------+
| user  |          0 | PRIMARY  |            1 | Host        | A         |        NULL |     NULL | NULL   |      | BTREE      |         |               |
| user  |          0 | PRIMARY  |            2 | User        | A         |           7 |     NULL | NULL   |      | BTREE      |         |               |
+-------+------------+----------+--------------+-------------+-----------+-------------+----------+--------+------+------------+---------+---------------+
2 rows in set (0.00 sec)

本人是根據無情站長的博客進行學習的，原創屬於無情站長，連接：https://www.cnblogs.com/skyhu365/p/10558216.html