To complete this tutorial, you should be familiar with databases. You do not need to be familiar with data mining concepts.
要完成本教程，读者应该熟悉数据库，但是不需要熟悉数据挖掘的概念。
Finally, in the case of database access, Android provides a completely different way to access databases, but with many familiar concepts.
最后，在数据库访问案例中，Android提供了完全不同的方法来访问数据库，但使用的是熟悉的概念。
If you are familiar with relational databases such as IBM DB2, MySQL, or PostgreSQL, then you will find key-value stores primitive in comparison.
如果您熟悉关系数据库，例如IBMDB 2、MySQL或PostgreSQL，则相比之下您将发现键值存储非常简单。
It USES technologies that most Ruby developers are familiar with, like ActiveRecord and standard ActiveRecord databases, and HTTP and S3 for communication and scaling.
它使用的是绝大多数Ruby开发者熟悉的技术，比如activerecord和标准的ActiveRecord数据库，以及用于通讯和伸缩的HTTP和S3等。
Solid computer background, familiar with different operating systems, databases, and platforms.
具备扎实的计算机技术知识，熟悉各种操作系统，数据库和平台。
Solid computer background, familiar with different operating systems, databases, and platforms.
具备扎实的计算机技术知识，熟悉各种操作系统，数据库和平台。
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