1.1 在命令行登录mysql，即可看到mysql的版本号

[root@heyong ~]# mysql -uroot -p
Enter password: 
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 487032
Server version: 5.7.17 MySQL Community Server (GPL)

Copyright (c) 2000, 2016, 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> 

2.利用navicat连接mysql的客户端工具可以查看

 连接之后右键——详细信息

3.利用mysql命令查看

mysql> select version();
+-----------+
| version() |
+-----------+
| 5.7.17    |
+-----------+
1 row in set (0.01 sec)

mysql> 

 4.在命令行使用status查看

mysql> status
--------------
mysql  Ver 14.14 Distrib 5.7.17, for linux-glibc2.5 (x86_64) using  EditLine wrapper

Connection id:        488398
Current database:    
Current user:        root@localhost
SSL:            Not in use
Current pager:        stdout
Using outfile:        ''
Using delimiter:    ;
Server version:        5.7.17 MySQL Community Server (GPL)
Protocol version:    10
Connection:        Localhost via UNIX socket
Server characterset:    utf8
Db     characterset:    utf8
Client characterset:    utf8
Conn.  characterset:    utf8
UNIX socket:        /tmp/mysql.sock
Uptime:            5 days 10 hours 5 min 40 sec

Threads: 154  Questions: 15051829  Slow queries: 0  Opens: 37599  Flush tables: 11  Open tables: 1563  Queries per second avg: 32.138
--------------

mysql> 

5.使用mysql --help | grep Distrib查看

[root@heyong tools]# mysql --help | grep Distrib 
mysql Ver 14.14 Distrib 5.7.17, for linux-glibc2.5 (x86_64) using EditLine wrapper