Checking MySQL version can be done easily via mysql CLI or using SQL.
mysql CLI
$ mysql -V
mysql Ver 14.14 Distrib 5.7.32, for Linux (x86_64) using EditLine wrapper
SQL
We can either get it from database server variables or using **version()**function.
mysql> show variables LIKE 'version';
+---------------+-------------------------+
| Variable_name | Value |
+---------------+-------------------------+
| version | 5.7.32-0ubuntu0.18.04.1 |
+---------------+-------------------------+
1 row in set (0.00 sec)
mysql> SELECT version();
+-------------------------+
| version() |
+-------------------------+
| 5.7.32-0ubuntu0.18.04.1 |
+-------------------------+
1 row in set (0.00 sec)