Abstract: A method and system for converting source data files into executable statements in a database query language such as SQL. The source data files include files created in an extensible language format such as XML that is lexically and/or structurally dissimilar to the database query language into which the source data file is to be converted. A library of transformations is maintained in the form of style sheets for performing formatting transformations on the source data files. Typically the library comprises one or more Extensible Stylesheet Language (XSL) stylesheets. The one or more stylesheets are applied to the source data file by a transformation engine such as an Extensible Stylesheet Language Transformation (XSLT) engine. The application of the one or more stylesheets from the library of transformations results in one or more executable statements in the desired database query language, which can then be sent to and executed by a Database Management System (DBMS).