How do you export all the records in a MongoDB collection to a .csv file? mongoexport --host localhost --db dbname --collection name --type=csv > test.csv This asks me to specify name of the ...

Our REST API allows users to add custom schemaless JSON to some of our REST resources, and we need it to be searchable in Elasticsearch. This custom data and its structure can be completely differe...

We're using MySQL to store schemaless data (see: Using a Relational Database for Schemaless Data for the solution inspired by how FriendFeed uses MySQL to store schemaless data). One big table hol...

I am interested in monitoring some objects. I expect to get about 10000 data points every 15 minutes. (Maybe not at first, but this is the 'general ballpark'). I would also like to be able to...

I have done a little bit of work with mongoDB in C# but all of my code is still in development. I am wondering what useful patterns people have found in evolving their domain classes over time as n...

I've been trying to answer a complex Mysql data structure problem for custom fields for an online app. I'm fairly new to Mysql so any input is appreciated. The current database is a relational dat...

I've been hearing a lot of talk about schema-less (often distributed) database systems like MongoDB, CouchDB, SimpleDB, etc... While I can understand they might be valuable for some purposes, in m...

So far Django has good integration with several RDBMS. NoSQL, schema-less and document-oriented DBMS are picking up. What's the status of integration those on-trend and fashionable DBMSes wit...

So I have an app that if I'm honest doesn't really need transactional integrity (lots of updates, none of them critical). So I was planning on simply leaving entity groups by the wayside for now. B...

I am toying with RDF, and in particular how to access information stored in a rdf storage. The huge difference from a traditional relational database is the lack of a predefined schema: in a relati...

I hear a lot about couchdb, but after reading some documents about it, I still don't get why to use it and how. Could you clarify this mystery for me?