如何找到我的MySQL URL,主机,端口和用户名？

Question

我需要找到我的MySQL用户名.当我打开MySQL命令行客户端时,它只询问我的密码.我不记得我的用户名了.为了与JDBC连接,我需要URL,主机和端口号.我在哪里可以找到所有这些？

Answer 1

如果您已经登录到命令行客户端,请尝试以下操作:

mysql> select user();

它将输出类似于此的内容:

+----------------+
| user()         |
+----------------+
| root@localhost |
+----------------+
1 row in set (0.41 sec)

在上面的例子中,我是root从上面登录的localhost.

要查找端口号和其他有趣的设置,请使用以下命令:

mysql> show variables;

Answer 2

如果您想知道运行Mysql的本地主机的端口号,可以在MySQL命令行客户端上使用此查询 -

SHOW VARIABLES WHERE Variable_name = 'port';


mysql> SHOW VARIABLES WHERE Variable_name = 'port';
+---------------+-------+
| Variable_name | Value |
+---------------+-------+
| port          | 3306  |
+---------------+-------+
1 row in set (0.00 sec)

它将为您提供运行MySQL的端口号.

如果你想知道你的Mysql的主机名,你可以在MySQL命令行客户端使用此查询 -

SHOW VARIABLES WHERE Variable_name = 'hostname';


mysql> SHOW VARIABLES WHERE Variable_name = 'hostname';
+-------------------+-------+
| Variable_name     | Value |
+-------------------+-------+
| hostname          | Dell  |
+-------------------+-------+
1 row in set (0.00 sec)

它将为您提供mysql的主机名.

如果你想知道你的Mysql的用户名,你可以在MySQL命令行客户端使用此查询 -

select user();   


mysql> select user();
+----------------+
| user()         |
+----------------+
| root@localhost |
+----------------+
1 row in set (0.00 sec)

它将为您提供mysql的用户名.

Answer 3

例如,您可以尝试:

//If you want to get user, you need start query in your mysql:
SELECT user(); // output your user: root@localhost
SELECT system_user(); // --

//If you want to get port your "mysql://user:pass@hostname:port/db"
SELECT @@port; //3306 is default

//If you want hostname your db, you can execute query
SELECT @@hostname;

Answer 4

如果您不知道确切的变量名称使用like,则结果可能包含超过500行:

mysql> show variables like "%port%";

Answer 5

default-username = root
password = you-know-it-better
url for localhost =  jdbc:mysql://localhost
default-port = 3306

Answer 6

如果使用 MySQL Workbench，只需查看侧边栏中信息窗格中的会话选项卡。

Answer 7

最简单的方法可能是使用命令状态；在输出中，您将找到数据库、用户、主机和端口：

mysql> status;
--------------
mysql  Ver 8.0.13 for Win64 on x86_64 (MySQL Community Server - GPL)

Connection id:          43
Current database:       mysql
Current user:           user@localhost
SSL:                    Cipher in use is DHE-RSA-AES128-GCM-SHA256
Using delimiter:        ;
Server version:         8.0.13 MySQL Community Server - GPL
Protocol version:       10
Connection:             localhost via TCP/IP
Server characterset:    utf8mb4
Db     characterset:    utf8mb4
Client characterset:    cp852
Conn.  characterset:    cp852
TCP port:               3306
Uptime:                 3 hours 32 min 40 sec

Threads: 3  Questions: 197  Slow queries: 0  Opens: 214  Flush tables: 2  Open tables: 190  Queries per second avg: 0.015
--------------