Simple, flexible, and powerful SQL database access toolkit for Ruby

 Sequel provides thread safety, connection pooling and a concise
 DSL for constructing SQL queries and table schemas.
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 Sequel includes a comprehensive ORM layer for mapping
 records to Ruby objects and handling associated records.
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 Sequel supports advanced database features such as prepared
 statements, bound variables, stored procedures, savepoints,
 two-phase commit, transaction isolation, master/slave
 configurations, and database sharding.
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 Sequel currently has adapters for ADO, Amalgalite, DataObjects,
 DB2, DBI, Firebird, IBM_DB, Informix, JDBC, MySQL, Mysql2, ODBC,
 OpenBase, Oracle, PostgreSQL, SQLite3, Swift, and TinyTDS.