Mapping data from files The mapping process requires defining the source and the target data. The software allows you to validate the data connection and create the table column definitions. You can automatically import the target table structure from the source file or manually create the column definitions. When the table structure does not map the source file data precisely, the loading process cannot identify the data to load for each table column and finishes unsuccessfully. To map data from files you need to know how to do the following: Defining a target database Defining a source file format Defining table columns The example in How to map data from a CSV file provides more information about the mapping process.