进入 mysql5.7 容器

sudo docker exec -it mysql5.7 bash

mysql -uroot -p123456

创建用户，密码随意

mysql> create user '239239'@'%' identified by '123456';
mysql> grant all privileges on *.* to '239239'@'%' with grant option;
mysql> flush privileges;

创建数据库
mysql> create database 239239;