The problem: The app must store a collection of people and who they know. Sometimes it must find out everyone who knows someone who knows Bob. Sometimes it must look further for everyone who is three ...

While relational databases rely on rigid structures, document databases are much more natural to work with and can be used for a variety of use cases across industries. A document database (also known ...

I was just thinking about this: fundamentally, what is the difference between a spreadsheet file with many sheets (technically, isn't it a relational database?) and an SQL DB?<BR><BR>There has to be ...