BPI001_UNW 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 "FS-Specific Attributes: Undesirable Customer" 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_BPI001_UNW TYPE BPI001_UNW.
The BPI001_UNW table consists of various fields, each holding specific information or linking keys about FS-Specific Attributes: Undesirable Customer data available in SAP. These include UNW_REASON (Reason for Undesirability), UNW_REMARK (Comment on Undesirability)... 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. .