Free / Open Source Non-SQL Database Servers and Engines
Database engines that do not use Structured Query Language
Free / Open Source Non-SQL Database Servers and Engines
Listed on this page are free and/or open source relational database engines, servers and libraries that do not use Structured Query Language (SQL) as the means for managing and accessing the database.
Note that if you cannot find a relational database management system that suits your requirements here, you may also want to check out the Free Database Libraries and Source Code page which may contain more libraries, some of which also do not use SQL. My decision whether to include a relational database library on that page or here on this page can sometimes be quite arbitrary, so it may be a good idea to take a look there as well.
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Disclaimer
The information provided on this page comes without any warranty whatsoever. Use it at your own risk. Just because a program, book, document or service is listed here or has a good review does not mean that I endorse or approve of the program or of any of its contents. All the other standard disclaimers also apply.
Free / Open Source Non-SQL Database Servers and Engines
- Berkeley DB, Berkeley DB XML, Berkeley DB Java Edition
Berkeley DB is an embedded database system that is thread-safe, has support for arbitrary data types, allows both keyed and sequential access to records, supports cursors, logical joins, secondary indices, memory-mapped and read-only databases, architecture-independent databases, databases up to 256 terabytes (with keys and values up to 4 gigabytes), supports concurrent accesses, fine-grained locking, group commit, load balancing, transparent failover, hot backups, etc. The licence requires you to distribute the source code for any application that uses Berkeley DB.
- NOSQL Relational Database Management System
NoSQL, a GNU GPLed relational database management system, is, as its name suggests, is not an SQL database. It's actually a shell-level tool that creates regular ASCII files that can be manipulated by other text tools (like text editors, etc). It is closely integrated with Unix, and the author created it because he wanted something he could use for simple database management tasks that didn't require the full feature set usually present in other DBMSes.
- LEAP Relational Database Management System (RDBMS)
A relational database management system that comes with full C source code, released under the GNU GPL. According to its website, it is as powerful as the complex offerings from Sybase, Oracle and IBM, but was originally written as an educational tool. It's query language is a full implementation of relational algebra. It supports Windows 95/NT, Linux, Solaris, SunOS, HP/UX, AIX, etc.
- nanoBase 1997
nanoBase is neither a database library nor an SQL server, but a clone of the old dBase. It is an xBase interpreter and it works under MSDOS. It comes with source code, and is apparently released under the GNU GPL.
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