dbExpress driver for Oracle - Version 4.20 dbExpress is a database-independent layer that defines a common interface to provide fast access to SQL database servers. For each supported server, dbExpress provides a driver as an independent library that implements the common dbExpress interfaces for processing queries and stored procedures. As a thin and simple data-access layer, dbExpress provides high performance database connectivity and is easy to deploy.dbExpress driver for Oracle (DbxOda) provides direct high performance access to Oracle database server. It can work using Oracle Call Interface (OCI) or SQL*Net directly. DbxOda supports Oracle 10g, Oracle 9i, Oracle 8i, Oracle 8 and Oracle 7. Driver requires Oracle software installed on client side to access through OCI. In case of working through SQL*Net TCP/IP protocol required only. Following development environments are supported by dbExpress drivers: