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isaac Mao

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an zai3

RE: Amazon 的服务 - 刀枪Blue

©Copyright 2009 刀枪Blue  |  7color Theme by Nishuang.de & zhou @ ThinkNext.net

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Kenyth Zeng
  • 面向文档的数据库中根本不存在表、行、列或关系。
  • 这并不意味着不能从 CouchDB 数据库获取一组关系数据。一个称为视图的特性允许您为没有在数据库中定义的文档创建一种任意关系。这意味着您能够获得典型的 SQL 联合查询的所有好处,但又不需要在数据库层预定义它们的关系。
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Kenyth Zeng
  • The App Engine datastore is strongly consistent, but it's not a relational database. While the datastore interface has many of the same features of traditional databases, the datastore's unique characteristics imply a different way of designing and managing data to take advantage of the ability to scale automatically.
  • Each entity also has a key that uniquely identifies the entity. The simplest key has a kind and a unique numeric ID provided by the datastore. The ID can also be a string provided by the application.



    An application can fetch an entity from the datastore by using its key, or by performing a query that matches the entity's properties.

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Carol Lin

2009.11京都‧底片系列 - a set on Flickr

Flickr is almost certainly the best online photo management and sharing application in the world. Show off your favorite photos and videos to the world, securely and privately show content to your friends and family, or blog the photos and videos you take with a cameraphone.

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