What does query by example actually mean? Find out inside PCMag's comprehensive tech and computer-related encyclopedia.

At the crux of many an enterprise-scale big data system stands either MapReduce or a parallel database management system. But which is more efficient? Researchers from Dublin Institute of Technology, ...

For example, you could query to find and extract all records that contained sales greater $1000 but less than $5000—but only on flat files (only one database matrix).

A question asked about data contained in two or more tables in a relational database. The relational query must specify the tables required and what the condition is that links them; for example ...