Relational Databases

Relational databases are great at storing tables.  ZODB is great at storing trees, even graphs.  Let us focus on trees today.    Have you ever tried choosing a county in Skype?   You have to choose from a  list of 130 countries. It is unnatural.   Much easier to use a tree to find a country.  Europe->Central Europe-> Poland.  I think that more web applications should use trees.   And in the python world, the natural place to store a tree is using the Persistent classes provided by the ZODB.

Traversing a relational database

Here is a way to traverse relational databases from Pyramid. 

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