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

Ruby library to interface with the SQLite3 database engine (http://www.sqlite.org). Precompiled binaries are available for common platforms for recent versions of Ruby.

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.

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.

A friendly MySQL-compatible library for Ruby, binding to libtrilogy

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.

This is MySQL connector. pure Ruby version

ODBC binding for Ruby

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.

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

Enhanced Ruby MySQL driver

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

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.