OTL 是 Oracle, Odbc and DB2-CLI Template Library 的缩写，是一个C++编译中操控关系数据库的模板库，它目前几乎支持当前所有的各种主流数据库，例如Oracle, MS SQL Server, Sybase, Informix, MySQL, DB2, Interbase / Firebird, PostgreSQL, SQLite, SAP/DB, TimesTen, MS ACCESS等等。-OTL is the Oracle, Odbc and DB2-CLI Template Library acronym, is a C++ compiler in the manipulation of relational database template library, it currently supports almost all current mainstream databases such as Oracle, MS SQL Server, Sybase, Informix, MySQL , DB2, Interbase/Firebird, PostgreSQL, SQLite, SAP/DB, TimesTen, MS ACCESS and so on.