mysql建库建表

```
CREATE USER 'user'@'%' IDENTIFIED BY '123456';

CREATE DATABASE IF NOT EXISTS dbname DEFAULT CHARSET utf8 COLLATE utf8_general_ci;
CREATE DATABASE IF NOT EXISTS dbname DEFAULT CHARSET utf8 COLLATE utf8_general_ci;
CREATE DATABASE IF NOT EXISTS dbname DEFAULT CHARSET utf8 COLLATE utf8_general_ci;
GRANT all privileges ON dbname.* TO 'user'@'%';
GRANT all privileges ON dbname.* TO 'user'@'%';
GRANT all privileges ON dbname.* TO 'user'@'%';
FLUSH PRIVILEGES;