On principle, the features and examples contained in the document Accessing Data in an Adabas Database also apply to the SQL databases supported by Natural.
Differences, if any, are described in the documents for the individual database access statements (see the Statements documentation) in paragraphs named Database-Specific Considerations or in the documents for the individual Natural parameters (see the Parameter Reference).
In addition, Natural for DB2 offers a specific set of statements to access DB2 and SQL/DS database management systems. For detailed information, refer to the appropriate add-on product description in the Database Management System Interfaces documentation: