这些框架还通过确保正确的数据库操作以及只在表现层编程的方式帮助初学者创建稳定的程序。

Frameworks can also help beginners to build more stable apps by ensuring proper database interaction and coding on the presentation layer.

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荷兰学者，拉特维荷芬，创造了一个包括国家等级在内的世界幸福数据库。

A Dutch scholar, Ruut Veenhoven, has created a World Database of Happiness, including national rankings.

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关于数据库修改的一点初学者问题？

Point on the database modifications for beginners problem?

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