Administer > Transforming, loading, and extracting data > Overview of the mass load utilities > Load data using the mass load utility
Load existing user data
This topic describes how to load existing customer information and user data into the WebSphere Commerce database.
- Load existing customer information
This topic describes how to load existing customer information from a comma-separated value (CSV) file to the WebSphere Commerce database by using the loading utilities. A CSV file contains table data as a series of ASCII text lines. The lines are organized by column. Each column value is separated by a comma from the next column's value, and each row starts a new line. Many spreadsheet programs can export data as CSV files.
- Load user data
You can load user data to the WebSphere Commerce database tables by using the Massload utility, SQL, or access beans.
- Example: Loading data into the MEMBER table (idresgen utility)
The idresgen utility handles resolution for tables that have identifiers generated for them by the system. This includes any table and column registered in the KEYS or SUBKEYS table. This resolution has two components: