This module allows Ruby programs to interface with the SQLite3 database engine (http://www.sqlite.org). You must have the SQLite engine installed in order to build this module. Note that this module is only compatible with SQLite 3.6.16 or newer.

Pg is the Ruby interface to the PostgreSQL RDBMS. It works with PostgreSQL 9.3 and later.

A simple, fast Mysql library for Ruby, binding to libmysql

This module allows Ruby programs to interface with the SQLite3 database engine (http://www.sqlite.org). You must have the SQLite engine installed in order to build this module. Note that this module is NOT compatible with SQLite 2.x.

This is the MySQL API module for Ruby. It provides the same functions for Ruby programs that the MySQL C API provides for C programs. This package is offered as gem for easy installation using RubyGems. It wraps unmodified tmtm's mysql-ruby extension into a proper gem. Please note that tmtm (Tomita Mashahiro) has deprecated development of this extension and only update it for bug fixes.

ruby-oci8 is a ruby interface for Oracle using OCI8 API. It is available with Oracle 10g or later including Oracle Instant Client.

Install this gem `require 'jdbc/mysql'` and invoke `Jdbc::MySQL.load_driver` within JRuby to load the driver.

Install this gem `require 'jdbc/postgres'` and invoke `Jdbc::Postgres.load_driver` within JRuby to load the driver.

ODBC binding for Ruby

This is MySQL connector. pure Ruby version

Enhanced Ruby MySQL driver

PostgreSQL Cursor is an extension to the ActiveRecord PostgreSQLAdapter for very large result sets. It provides a cursor open/fetch/close interface to access data without loading all rows into memory, and instead loads the result rows in 'chunks' (default of 1_000 rows), buffers them, and returns the rows one at a time.

A pure Ruby interface to the PostgreSQL (>= 7.4) database

Simple gem that makes working with raw MySQL in Ruby efficient and fun! It's basically a query string builder (not an ORM!) that takes care of sanatization and sql chaining.

Rails Driver and Adapter for IBM Data Servers: {DB2 on Linux/Unix/Windows, DB2 on zOS, DB2 on i5/OS, Informix (IDS)}