mysql基礎語句(修改端口、用戶、密碼)

cmd進入mysql，首先進入安裝目錄bin文件下 ：

D:\javaTools\mysql-8.0.17-winx64\bin>mysql -u  root -p

輸入密碼：

D:\javaTools\mysql-8.0.17-winx64\bin>mysql -u  root -p
Enter password: **********
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 38
Server version: 8.0.17 MySQL Community Server - GPL

Copyright (c) 2000, 2019, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

mysql>

一、修改端口

1.顯示端口

mysql> show global variables like 'port';
+---------------+-------+
| Variable_name | Value |
+---------------+-------+
| port          | 3306  |
+---------------+-------+
1 row in set, 1 warning (0.01 sec)

mysql>

2.找到配置文件增加或修改：port = 3307

二、修改用戶密碼

查看用戶表（密碼是加密的，看不了）：

select user,host from mysql.user;

SET PASSWORD FOR root@localhost = ''

三、修改root用戶名

rename user root@localhost to kaiba@localhost