A Brief History of Non-Relational Databases

First came relational databases, which provide a useful comparison for understanding non-relational databases. Invented by Edgar F. Codd in 1970, the relational database arranges data into different rows and columns by associating a specific key for each row. Almost all relational database systems use Structured Query Language (SQL) and are remarkably complex. They are traditionally […]

NoSQL, CAP Theorem, and ACID

by Angela Guess Gavin Clarke of The Register reports, “CAP theorem holds no fear for six engineers building FoundationDB, the industry’s latest NoSQL candidate. The difference? It adheres to the principles of ACID found in relational, which previous NoSQLers have tried to replace. ‘A lot of people developing NoSQL systems have been discouraged by the CAP theorem […]

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