You can use the ipload utility to build
a map. A map specifies the relationship between the fields
of a data file and the columns of a database.
To load data into a database, you define a load map, which associates
fields from records in a data file to columns in a database table.
To unload data, you define an unload map. The unload map associates
the columns that a query retrieves from one or more tables to the
fields in a data file.
The following figure shows the relationship between load and unload
maps.Figure 1. Using a map
The ipload utility stores information about
maps in the maps, mapitem, mapoption, and mapreplace tables
of the onpload database.
You can define a map at any time. After you define a map, you use
it with the Load Job window or the onpload utility.
