Discovering MongoDB

MongoDB is an open source document oriented database engine developed and supported by 10gen. MongoDB can be downloaded from http://www.mongodb.org/downloads. The documents are stored as JSON objects although they can be XML. Documents that are stored can be accessed using a REST based notation. When working with MongoDB the terminology is simiar to SQL although there are differences. Tables are collections and Rows are documents and columns are fields as shown in this comparison: http://docs.mongodb.org/manual/reference/sql-comparison/. The documentation shows that client queries working with MongoDB use Javasscript rather than SQL syntax. MongoDB was written in C++. Avoid the 32 bit version since it has a 2 Gb limit.  There is an online tutorial here: http://try.mongodb.org/.  The FAQs are here: MongoDB FAQ

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