您如何访问Magento Commerce的数据库（I / O）？

So, I want to import, export and modify the database. I have read that I have to do that by XML, but I don't really understand their doc system and I haven't found any good tutorials out there that explain this. I am slowly reading the very expensive and short book which is somewhat answering my questions, but I crave more.So, I want to import, export and modify the dat