SQLAPILibrary
SQLAPI++ is a C++ library for accessing multiple SQL databases (Oracle, SQL Server, DB2, Sybase, Informix, InterBase, SQLBase, MySQL, PostgreSQL and ODBC, SQLite). It uses native APIs of target DBMS so applications developed with SQLAPI++ library run swiftly and efficiently. The product also provides a low-level interface that allows developers to access database-specific features. By encapsulating a vendor's API, SQLAPI++ library acts as middleware and delivers database portability