Zend::Db::Table::Abstract Class for SQL table interface
Zend::Db factory for Zend_Db_Adapter_Abstract
Zend::Db::Select Class for SQL SELECT generation and results(Zend_Db_Adapter_Abstract Zend_Db_expr)
Zend::Db::Adapter::Abstract Class for connecting to SQL databases and performing common operations(Zend_Db Zend_Db_Select)
