命令提示符下登录mysql数据库

C:\Users\Administrator>mysql -h localhost -P 3390 -uroot -p      （-P 后面是端口号，P是大写字母）
Enter password: *********
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 55
Server version: 5.6.21-log MySQL Community Server (GPL)

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

mysql>C:\Users\Administrator>mysql -h localhost -P 3390