查找mysql数据文件存放位置

1. 在开始处右击打开Windows Powershell 。
2. 输入代码如下：

PS C:\WINDOWS\system32> net stop mysql
MySQL 服务正在停止.
MySQL 服务已成功停止。

PS C:\WINDOWS\system32> net start mysql
MySQL 服务正在启动 .
MySQL 服务已经启动成功。

PS C:\WINDOWS\system32> mysql -u root -p
Enter password: ****
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 1
Server version: 5.5.60 MySQL Community Server (GPL)

Copyright (c) 2000, 2018, 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> show variables like 'datadir'
    -> show variables like 'datadir';
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'show variables like 'datadir'' at line 2
mysql> show variables like 'datadir';
+---------------+---------------------------------------------+
| Variable_name | Value                                       |
+---------------+---------------------------------------------+
| datadir       | C:\ProgramData\MySQL\MySQL Server 5.5\Data\ |
+---------------+---------------------------------------------+
1 row in set (0.00 sec)