All | (Big) Data Analytics | Algorithms | Artificial Intelligence | Bayesian Networks | Business & Strategy | Computer Vision | Data Journalism | Data Mining | Data Scientists | Data Structures | Data Visualization | General Data Science | Hadoop, MapReduce | Information Retrieval | Linear Regression | Linguistic | Machine Learning, Predictive Analytics | Math | Metadata | Natural Language Processing | Network Science | Other Sites with Free Data Science Resources | Probability | Python | R | Singularity/Transhumanism | Statistics | Text MiningNoSQL Databases.
Cassandra Query Language.
Extracting Data from NoSQL Databases: A step towards interactive visual analysis of NoSQL data.
Graph Databases: New opportunities for connected data.
The Definitive Guide to Graph Databases for the RDBMS Developer.
The Little MongoDB Book.
SQL for Web Nerds.
CouchDB: The definitive guide. Shows you how to use this document-oriented database as a standalone application framework or with high-volume, distributed applications
Learn SQL The Hard Way. A crash course in the basics of SQL to store, structure, and analyze data
SQL Tutorial. A quick start to SQL. It covers most of the topics required for a basic understanding of SQL and to get a feel of how it works
An Introduction to Information Retrieval. Scientific underpinnings of information retrieval