ROXPCC0120 is a standard SAP Structure so does not store data like a database table does. It can be used to define the fields of other actual tables or to process "What If Persisted Data" Information within sap ABAP programs. This is done by declaring abap internal tables, work areas or database tables based on this Structure. These can then be used to store and process the required data appropriately. i.e. DATA: wa_ROXPCC0120 TYPE ROXPCC0120.
The ROXPCC0120 table consists of various fields, each holding specific information or linking keys about What If Persisted Data data available in SAP. These include GUID (Guid for application objects), EXTERNAL_ID (Business Object ID), PORTFOLIO_GUID (Guid for application objects), PARENT_GUID (Guid for application objects)... See below for full list along with technical details, documentation, text table, check tables, foreign key relationships, conversion routines, relevant tcodes and example ABAP select code etc. .