Open Source C Libraries

EJDB 2.0, Embeddable JSON Database engine C library. Simple XPath like query language (JQL). Websockets / Android / iOS / React Native / Flutter / Java / Dart / Node.js bindings. Docker image. Array elements are matched from start to end. In equal arrays all values at the same index should be equal. Lexicographically sort object keys in both maps. Do matching keys and its values starting from the lowest key. Database index can be build for any JSON field path containing values of number or string type. All documents in collection are sorted by their primary key in descending order. So if you use auto generated keys (ejdb_put_new) you may be sure what documents fetched as result of full scan query will be ordered according to the time of insertion in descendant order, unless you don't use query sorting, indexes or inverse keyword.

pgtclng (PostgreSQL Tcl Next-Generation) is a loadable Tcl module for accessing PostgreSQL databases. It was forked from pgtcl in Feb 2004, moved to pgfoundy.org in Aug 2006 and to Sourceforge.net in Mar 2011. Its API is a superset of the pure-Tcl companion project pgintcl.

Biblioteca C que implementa pequeno sistema de armazenamento de dados em tabelas em arquivos binários.

Reporting engine library written in C. Create one XML file and generate PDF, HTML, TXT, and CSV reports based on queries. Has support for MySQL, PostgreSQL, ODBC. Bindings for PHP, Java, Python.

lib4d_sql is a C library providing the required functions (connect, prepare, execute, ...) to write a SQL client for 4D databases. It uses the public 4D SQL protocol wich is supported by 4D products since... the version 11. It is already used by the PDO_

SQLiteSEM is SQLite SFENCE extension module which allow SFENCE object Container_Container works with SQLite database.

Very simple struct storage system, AVL and red-black tree based database library - database engine. You can define indexes over C struct.

this server side PostgreeSQL extension enables developer to create, store, train and apply artificial neural networks in the serverside context of PostgreSQL. It is based on fann, the Fast Artificial Neural Network Library by Steffen Nissen (Thanks!).

SPAWK stands for [S]QL [P]owerd AWK and is an elegant way for accessing and manipulating MySQL databases from within awk programs.

XDBM version 2 will be an XQuery implementation that uses EXIP to handle binary XML in the EXI format adopted by the W3C. It will, like EXIP, aim to be as small as possible so that it runs well on resource constrained devices. It is still in the project design stage.