查看mysql版本的方法：

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 487032Server 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mysql命令查看

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

3.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

推荐教程： 《mysql教程》