开始升级之前，备份你的数据库非常重要。
It is extremely important to back up your database before beginning the upgrade.
这个过程的详细的解释，请阅读备份你的数据库。
Please read WordPress: Backing Up Your Database for a detailed explanation of this process.
如果你想成为额外的安全，那么你也应该让您的数据库的备份副本。
If you want to be extra safe, then you should also make a backup copy of your DB.
应用推荐