PostgreSQL is powerful and widely compatible, supporting the complete SQL standard, including transactions, foreign keys, ...

For a few decades, structured data are typically arranged as relational tables and stored in relational databases. Recent years have witnessed the blossom of graph databases, for which graph becomes ...

Multivalue databases handle certain data structures that are just a little too complex for conventional relational databases. This post is one of a series that introduces the fundamentals of NOSQL ...

Excel possesses formidable database powers. Creating a relational database starts with a Master table that links to subordinates called (awkwardly) Slave, Child, or Detail tables.

XML databases can handle data of just about any size or format. This post is one of a series that introduces the fundamentals of NOSQL databases, and their role in Big Data Analytics.